selective focus of teacher in eyeglasses pointing at blank whiteboard while students sitting in classroom

back view of schoolchildren sitting at desks and teacher making presentation at whiteboard

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图像库的back view of schoolchildren sitting at desks and teacher making presentation at whiteboard 图像 Image 118053291.

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Back View Of Schoolchildren Sitting At Desks And Teacher Making Presentation At Whiteboard 正版图像 123RF中国 - 高质量免版税图像库. Image 118053291.

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back view of schoolchildren sitting at desks and teacher making presentation at whiteboard

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