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Education high school and people concept tutor needs to be enthusiastic and needs to like his subject
Education high school and people concept tutor needs to be enthusiastic and needs to like his subject123RF高級產品
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Happy senior lecturer holding paper plane in hand
Happy senior lecturer holding paper plane in hand
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Grey hair professor holding paper plane in lecture hall
Grey hair professor holding paper plane in lecture hall
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Old male teacher in front of blackboard 版權商用圖片
Old male teacher in front of blackboard123RF高級產品
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Close up portrait of cheerful affable stylish trendy rich intelligent smart dreamy professional elegant excited elite luxurious old fashioned grandpa
Close up portrait of cheerful affable stylish trendy rich intelligent smart dreamy professional elegant excited elite luxurious old fashioned grandpa
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Smiling professor explains new chemistry topic teacher writes formula on the blackboard explanation for students educational concept closeup of sientist professor writing bio elements on board 版權商用圖片
Smiling professor explains new chemistry topic teacher writes formula on the blackboard explanation for students educational concept closeup of sientist professor writing bio elements on board
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Senior male ceo executive businessman in office business people concept
Senior male ceo executive businessman in office business people concept
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Senior man wearing suit and red tie studio shot
Senior man wearing suit and red tie studio shot
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Smiling businessman holding jacket on shoulder 版權商用圖片
Smiling businessman holding jacket on shoulder123RF高級產品
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Senior man reading
Senior man reading
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Grey hair professor standing in lecture room and looking at camera 版權商用圖片
Grey hair professor standing in lecture room and looking at camera
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Closeup of happy middle aged business speaker 版權商用圖片
Closeup of happy middle aged business speaker123RF高級產品
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Senior teacher beside blackboard on white background
Senior teacher beside blackboard on white background
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Old male english language teacher in the classroom 版權商用圖片
Old male english language teacher in the classroom123RF高級產品
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Old male english language teacher in the classroom
Old male english language teacher in the classroom123RF高級產品
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Asian businessman standing by his desk in office
Asian businessman standing by his desk in office
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Mature handsome italian man doctor wearing protective glasses 版權商用圖片
Mature handsome italian man doctor wearing protective glasses123RF高級產品
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Older male thinking teacher standing in front of a chalkboard in a classroom think senior teachers job and learning concept
Older male thinking teacher standing in front of a chalkboard in a classroom think senior teachers job and learning concept123RF高級產品
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Front view of a caucasian schoolboy in white wig raising hand while standing in front of the white board in laboratory at school
Front view of a caucasian schoolboy in white wig raising hand while standing in front of the white board in laboratory at school123RF高級產品
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Professor of chemistry writes on the blackboard formula in university 版權商用圖片
Professor of chemistry writes on the blackboard formula in university
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Senior handsome man wearing stylish clothes against brown backgr
Senior handsome man wearing stylish clothes against brown backgr123RF高級產品
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Happy mature businessman working with modern tablet isolated on black background
Happy mature businessman working with modern tablet isolated on black background
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The handsome mad bearded scientist with question 版權商用圖片
The handsome mad bearded scientist with question123RF高級產品
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Senior as successful entrepreneur and business manager with self confidence
Senior as successful entrepreneur and business manager with self confidence123RF高級產品
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Portrait of middle aged professor sitting at desk with book heaps on it 版權商用圖片
Portrait of middle aged professor sitting at desk with book heaps on it
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Young handsome student in front of big blackboard
Young handsome student in front of big blackboard123RF高級產品
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Teacher silhouette against big blackboard with mathematical symbols and formulas studio shot on black background
Teacher silhouette against big blackboard with mathematical symbols and formulas studio shot on black background123RF高級產品
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Crazy male doctor in glasses showing tongue
Crazy male doctor in glasses showing tongue
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Handsome senior man in full suit pointing copy space while standing against grey background
Handsome senior man in full suit pointing copy space while standing against grey background123RF高級產品
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Side view of a thoughtful business man
Side view of a thoughtful business man
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Thinking business woman turning gear cogs and running hamster
Thinking business woman turning gear cogs and running hamster
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Unshaven handsome man in soft sweater standing in cafe near white wall with copy space for text he holding hands over chest and looking in camera 版權商用圖片
Unshaven handsome man in soft sweater standing in cafe near white wall with copy space for text he holding hands over chest and looking in camera
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A young chemistry teacher in the middle of a chemical process explanation with tubes reactions drawn on the blackboard back to school concept
A young chemistry teacher in the middle of a chemical process explanation with tubes reactions drawn on the blackboard back to school concept
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Portrait of mature teacher or tutor professor working at table in college or school
Portrait of mature teacher or tutor professor working at table in college or school123RF高級產品
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Portrait of attractive cheery skilled gray haired man bookkeeper leader partner touching specs at work place station indoors
Portrait of attractive cheery skilled gray haired man bookkeeper leader partner touching specs at work place station indoors123RF高級產品
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Portrait of senior adult man reading book at home office
Portrait of senior adult man reading book at home office123RF高級產品
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Man with folder of documents stands in office
Man with folder of documents stands in office123RF高級產品
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Conversation with employers
Conversation with employers
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A young teacher in glasses sitting at classroom desk with pile of books in front of clean blackboard back to school concept 版權商用圖片
A young teacher in glasses sitting at classroom desk with pile of books in front of clean blackboard back to school concept
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Handsome bearded senior tourist man exploring the city in black and white 版權商用圖片
Handsome bearded senior tourist man exploring the city in black and white
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Senior businessman gesturing and telling something to audience rear view of audience with two blurry people seen
Senior businessman gesturing and telling something to audience rear view of audience with two blurry people seen123RF高級產品
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Young male doctor is writing on the blue digital screen
Young male doctor is writing on the blue digital screen
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Man and woman business partners with laptop sitting in a cafe in city talking
Man and woman business partners with laptop sitting in a cafe in city talking123RF高級產品
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Hipster teacher writing on big blackboard with mathematical symbols and formulas standing on step ladder studio shot on black background
Hipster teacher writing on big blackboard with mathematical symbols and formulas standing on step ladder studio shot on black background123RF高級產品
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Senior businessman contemplating during office meeting with colleagues 版權商用圖片
Senior businessman contemplating during office meeting with colleagues123RF高級產品
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Full length shot of old cheerful man in eyeglasses looking camera and showing ok gesture isolated over white background
Full length shot of old cheerful man in eyeglasses looking camera and showing ok gesture isolated over white background
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Start of a new working day with a cup of coffee handsome mature man holding coffee cup standing in his modern office
Start of a new working day with a cup of coffee handsome mature man holding coffee cup standing in his modern office123RF高級產品
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Mature man working on architectural project in office
Mature man working on architectural project in office123RF高級產品
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Senior to gutsa in japanese
Senior to gutsa in japanese
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Portrait of thoughtful senior caucasian man with a grey beard and holding pen
Portrait of thoughtful senior caucasian man with a grey beard and holding pen123RF高級產品
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Man teacher in front of chalkboard 版權商用圖片
Man teacher in front of chalkboard123RF高級產品
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Welcoming senior businessman waving at camera
Welcoming senior businessman waving at camera123RF高級產品
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Portrait of businessman in office man in shirt looking at camera blackboard with writings and paper notes on it in background business job late night work concept
Portrait of businessman in office man in shirt looking at camera blackboard with writings and paper notes on it in background business job late night work concept123RF高級產品
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Thoughtful man with grizzled hair touching face and thinking posing with elbows on knees while sitting on grey background in studio
Thoughtful man with grizzled hair touching face and thinking posing with elbows on knees while sitting on grey background in studio123RF高級產品
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Young successful businessmen talk about main problems of their project discuss issues 版權商用圖片
Young successful businessmen talk about main problems of their project discuss issues
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Doctor wich clipboard empty copy space and pointing device
Doctor wich clipboard empty copy space and pointing device
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Senior businessman with travel suitcase in airport
Senior businessman with travel suitcase in airport123RF高級產品
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Dark haired tattooed man elegant concentrated guy in clear glasses wearing white shirt while recording educative content
Dark haired tattooed man elegant concentrated guy in clear glasses wearing white shirt while recording educative content
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Grey hair professor pointing on something with pencil on blackboard
Grey hair professor pointing on something with pencil on blackboard
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Bald male professor with digital tablet standing in classroom
Bald male professor with digital tablet standing in classroom123RF高級產品
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Positive relaxed mature business man standing in office cafe leaning on counter holding jacket over shoulder and smiling at camera medium shot business portrait concept 版權商用圖片
Positive relaxed mature business man standing in office cafe leaning on counter holding jacket over shoulder and smiling at camera medium shot business portrait concept123RF高級產品
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Genius boy in red glasses near blackboard with formulas 版權商用圖片
Genius boy in red glasses near blackboard with formulas
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Teacher old school generation experienced lecturer mature teacher enjoy teaching sharing knowledge earning certifications for particular programs senior intelligent man teacher at chalkboard 版權商用圖片
Teacher old school generation experienced lecturer mature teacher enjoy teaching sharing knowledge earning certifications for particular programs senior intelligent man teacher at chalkboard123RF高級產品
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Portrait of teacher in classroom handsome bearded man near blackboard in classroom teacher professor standing in front of blackboard teaching student in classroom
Portrait of teacher in classroom handsome bearded man near blackboard in classroom teacher professor standing in front of blackboard teaching student in classroom123RF高級產品
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Confident young math professor standing in front of the chalkboard and explaining formulas he is pointing and smiling 版權商用圖片
Confident young math professor standing in front of the chalkboard and explaining formulas he is pointing and smiling123RF高級產品
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Close up of glasses in senior businessmans hands
Close up of glasses in senior businessmans hands123RF高級產品
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Professional development concept with vintage businessman and calculator at office
Professional development concept with vintage businessman and calculator at office
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Front view of a thoughtful mixed race schoolboy in chemistry coat looking above his head while standing in front of the white board in the laboratory at school 版權商用圖片
Front view of a thoughtful mixed race schoolboy in chemistry coat looking above his head while standing in front of the white board in the laboratory at school123RF高級產品
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Senior teacher portrait behind some books isolated on black 版權商用圖片
Senior teacher portrait behind some books isolated on black
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Desperate jobless messy businessman holding a torn cardboard sign and looking at camera blank copy space
Desperate jobless messy businessman holding a torn cardboard sign and looking at camera blank copy space123RF高級產品
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Bearded businessman in eyeglasses holding smartphone while working in office at night 版權商用圖片
Bearded businessman in eyeglasses holding smartphone while working in office at night123RF高級產品
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Education goals school education concept useful knowledge education trends provide customised education to deliver right content at right time senior intelligent man teacher at chalkboard
Education goals school education concept useful knowledge education trends provide customised education to deliver right content at right time senior intelligent man teacher at chalkboard123RF高級產品
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Portrait of handsome student looking at camera on background of chalkboard 版權商用圖片
Portrait of handsome student looking at camera on background of chalkboard
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Man reading an old book
Man reading an old book
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Handsome pensive mature businessman in the office 版權商用圖片
Handsome pensive mature businessman in the office123RF高級產品
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An outdoor photo of a senior indian south asian man looking to camera vertical composition
An outdoor photo of a senior indian south asian man looking to camera vertical composition
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Young business man portrait at the office
Young business man portrait at the office
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Portrait of middle aged man 60s with grey hair and beard working with documents while holding clipboard isolated over black background
Portrait of middle aged man 60s with grey hair and beard working with documents while holding clipboard isolated over black background
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Successful businessman use retro typewriter mature man dyed beard hair professional typist make notes modern and old technology digital business vintage typewriter new technology copy space
Successful businessman use retro typewriter mature man dyed beard hair professional typist make notes modern and old technology digital business vintage typewriter new technology copy space123RF高級產品
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Teacher at chemistry class
Teacher at chemistry class
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Handsome young school boy thinking about complex mathematical signs 版權商用圖片
Handsome young school boy thinking about complex mathematical signs
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Happy senior man with open book in the library empty space for text
Happy senior man with open book in the library empty space for text123RF高級產品
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Portrait of happy successful businessman satisfied man feeling confident in a creative office 版權商用圖片
Portrait of happy successful businessman satisfied man feeling confident in a creative office123RF高級產品
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Facing business challenges with confidence studio shot of a handsome mature businessman looking thoughtful while standing against a dark background 版權商用圖片
Facing business challenges with confidence studio shot of a handsome mature businessman looking thoughtful while standing against a dark background123RF高級產品
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Bald professor of modern university sitting by desk against blackboard while keeping hands by chin and looking at you in large classroom
Bald professor of modern university sitting by desk against blackboard while keeping hands by chin and looking at you in large classroom123RF高級產品
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A young indian man in a blue shirt and glasses poses thoughtfully in front of school board
A young indian man in a blue shirt and glasses poses thoughtfully in front of school board123RF高級產品
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Senior businessman in suit and tie with gray hair and beard holds document in hands
Senior businessman in suit and tie with gray hair and beard holds document in hands123RF高級產品
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Happy senior man in glasses smiling at home 版權商用圖片
Happy senior man in glasses smiling at home
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Portrait of a business elderly man in a suit with a notebook and a pen looks at camera on a peach background black and white concept 版權商用圖片
Portrait of a business elderly man in a suit with a notebook and a pen looks at camera on a peach background black and white concept123RF高級產品
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Education and home concept stressed student with books successful students are mostly creative university students studying with books in library what qualities make teacher
Education and home concept stressed student with books successful students are mostly creative university students studying with books in library what qualities make teacher
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Teacher at chemistry class 版權商用圖片
Teacher at chemistry class
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Asian boy holding a light bulb with chalkboard 版權商用圖片
Asian boy holding a light bulb with chalkboard
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Portrait of a successful business man businessman smiling
Portrait of a successful business man businessman smiling123RF高級產品
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Old male math teacher in the classroom
Old male math teacher in the classroom123RF高級產品
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Young student is solving math exam mathematics formular on blackboard in background
Young student is solving math exam mathematics formular on blackboard in background
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Studio shot of handsome senior bearded businessman hiding behind white mask with eyeglasses against white background 版權商用圖片
Studio shot of handsome senior bearded businessman hiding behind white mask with eyeglasses against white background123RF高級產品
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Senior lecturer leaning on wooden tribune in classroom
Senior lecturer leaning on wooden tribune in classroom
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Startup business team brainstorming on meeting workshop 版權商用圖片
Startup business team brainstorming on meeting workshop
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Attractive old singer resing on the sofa in the modern room 版權商用圖片
Attractive old singer resing on the sofa in the modern room
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Senior authoritarian professor yelling and pointing at the blackboard with a stick traditional education concept
Senior authoritarian professor yelling and pointing at the blackboard with a stick traditional education concept123RF高級產品
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