Overhead view of chalkboard with school supplies on a dark textured background overhead view of chalkboard with school supplies on 免版税库存图片 overhead view of chalkboard with school supplies on a dark textured background overhead view of chalkboard with school supplies on
上世纪90年代，在一间教室里，两名学生悄悄地递交手写的笔记，教室里装着一块黑板和头顶的投影仪. 焦点 免版税图库摄影 上世纪90年代，在一间教室里，两名学生悄悄地递交手写的笔记，教室里装着一块黑板和头顶的投影仪. 焦点
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