当你解决一个数学问题时，你不仅得到了答案，还理解了为什么这是答案。

The most effective policies are often the simplest ones.

Time is a great teacher, but unfortunately it kills all its pupils.

I've learned that people will forget what you said, people will forget what you did, but people will never forget how you made them feel.

The greatest mistake a man can make is to be afraid of making one.

We never cease to stand like curious children before the great mystery into which we were born.

可持续经济增长的关键在于全要素生产率的持续提升。