不要借钱给你的朋友，除非你愿意把借出去的钱当成礼物。
Don’t loan money to a friend unless you are ready to make it a gift.
When people are confronted with a problem, they often try to solve it by breaking it down into smaller parts. But sometimes, the solution lies in seeing the problem as a whole.
The pursuit of mathematical truth is a deeply personal and profoundly universal endeavor.
