全部 » Close Up » 一个年轻的学生正在正方形的笔记本上画一张数学图表 A young student is drawing a mathematical chart in the squared notebook

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.