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Hakutulokset: "wissen" kaikista kielivaihtoehdoista (Yhteensä 965 kuvaa). kuvaa/sivu

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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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In the library - pretty, female student with books, papers and laptop computer working in a high school library (color toned image)
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Physical equations (electromagnetics) hand written on paper
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Pretty female student standing at bookshelf in university library store shop searching for a book
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In the library - pretty, female student with books, papers and laptop computer working in a high school library (color toned image)
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In the library - pretty, female student with books, papers and laptop computer working in a high school library (color toned image)
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In the library - pretty, female student with books, papers and laptop computer working in a high school library (color toned image)
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Portrait of a pretty young college student writing on the blackboard during a maths class (color toned image)
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Group of college/university students during a brake between classes - chatting, comparing notes, having fun (shallow DOF; color toned image)
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happy young school girl portrait on math class
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Pretty, female college student in a library, looking for a book (shallow DOF; color toned image)
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Pretty, female college student in a library, looking for a book (shallow DOF; color toned image)
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Portrait of a pretty young college student writing on the blackboard during a maths class (color toned image)
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Portrait of a pretty young college student writing on the blackboard during a maths class (color toned image)
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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Pretty, female college student in a library, looking for a book (shallow DOF; color toned image)
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Pencil with rubber erasing illustration of lock
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Pretty young college student in a library (shallow DOF; color toned image)
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abstract science and chemical molecule structure on white board in school classroom background
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happy young teens group in school have fun an learning lessons
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happy young teenage boy portrait in school on chemistry classes and library
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abstract science and chemical molecule structure on white board in school classroom background
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Schoolgirl looking in opened book with sketches at background. Elements of this image are furnished by NASA
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Boy of school age in glasses. Idea concept
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happy student woman group portrait at library
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Young woman in casual hiding face behind reading
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Young woman in casual hiding face behind reading. Elements of this image are furnished by NASA
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Pretty, young college student studying in the library/a study room at campus , using her modern laptop computer, writing notes, preparing for exams (shallow DOF)
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Pretty, young college student studying in the library/a study room at campus , using her modern laptop computer, writing notes, preparing for exams (shallow DOF)
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Little Halloween witch reading conjure above pot
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Little Halloween witch reading conjure above pot
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happy young teens group in school on chemisty lessons and library education
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happy young teens group in school on chemisty lessons and library education
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Hand drawn business ideas sketch against nature background
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Hand drawn business ideas sketch against nature background
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icon set in black background for use
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Edelliset 10 sivua Edellinen sivu 1 .. 16 17 18 19 20 21 22 .. 25 Seuraava sivu Seuraavat 10 sivua