If you want to live a happy life, tie it to a goal, not to people or things.
学习问题的复杂性通常由假设空间的大小和结构决定。
You find out who your real friends are when you're involved in a scandal.
这不仅不正确,甚至算不上错误。
No man is fit to hold office who isn't perfectly willing to leave it at any time...