成功不是幸福的关键，幸福才是成功的关键

Sustainable fishing isn't an option—it's the only way forward if we want to preserve marine ecosystems.

学习数学的唯一方法就是做数学。

If you're not stubborn， you'll give up on experiments too soon. And if you're not flexible， you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.