The pursuit of mathematical knowledge is a journey that never ends.
追求数学知识是一段永无止境的旅程。
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。”
The past is always there, and it's always different every time you look at it.
