The progress of science is not a straight line, but a series of zigzags, often retracing steps to gain a better foothold.
科学的进步不是一条直线,而是一系列曲折,常常需要回溯步骤以获得更好的立足点。
The only way to learn mathematics is to do mathematics.
The more I live, the more I regret how little I know.
孔子说:“唯女子与小人难以对付。太亲近了,他们就会失礼;太疏远了,他们就会怨恨。”