亚洲小男孩在家学习，通过在线课堂，由老师指导组装分子模型。在家学习的孩子练习逻辑思维，并通过远程应用程序与老师交流 免版税库存照片 亚洲小男孩在家学习，通过在线课堂，由老师指导组装分子模型。在家学习的孩子练习逻辑思维，并通过远程应用程序与老师交流
Science classroom scene with chalkboard equations books molecular model microscope pencils globe and calculator learning discovery 库存图片 science classroom scene with chalkboard equations books molecular model microscope pencils globe and calculator learning discovery
Two students studying science outdoors with a brain model and molecular kit on bench examine while taking notes casual outdoor 库存图片 two students studying science outdoors with a brain model and molecular kit on bench examine while taking notes casual outdoor
Caucasian child smiling while swimming in calm water near rocky shoreline 免版税库存照片 Caucasian child smiling while swimming in calm water near rocky shoreline
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