知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 “A individual who never created a miscalculation by no means tried using anything new.” – Albert Einstein “Shoot for the moon. Even though you pass up, you are going to land among the stars.” – Norman Vincent Peale “Your time is proscribed, don't squander it living another https://share.evernote.com/note/da337949-239b-da24-2f80-0e6d723ea9bf