“你知道勾股容圆吗?”一位初中生回答说:“不知道.但我喜欢勾股定理.”“你能证明勾股定理吗?”他想了想,怪不好意思地说:“不会.不过,这是老师的事.”……还基于其他原因,迫使我写《勾股容圆》这篇短文. “Do you know what the quotation is?” A junior high school student replied: “I don’t know. But I like the Pythagorean theorem.” “Can you prove the Pythagorean theorem?” He thought about it, and he was embarrassed to say: “No. However, this is a teacher’s business.”... For other reasons, it forced me to write the short essay on “Commenter”.