Mathematics is not a deductive science—that's a cliché. When you try to prove a theorem, you don't just list the hypotheses and then start to reason. What you do is trial and error, experimentation, guesswork.
在网球中,心态是最重要的。
Every piece of plastic we produce should have a clear path to being reused or recycled.
"The past is never dead. It's not even past."
若要优美的嘴唇,要讲亲切的话。
事实是,每个人都会伤害你;你只需要找到那些值得你为之受苦的人。