9视频豆瓣9.1
11视频豆瓣6.3
1视频
4视频豆瓣7.6
20视频
13视频豆瓣7.0
一名年轻学生在长方形网格笔记本内勤奋地绘制了一张细致的数学图表,旁边放着一个计算器。
Top shot of a young student diligently sketching a meticulous mathematical chart within the rectangular grid notebook with a calculator by the side.
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