The best way to understand a program is to try to change it.

The truth is at once simpler and more complicated.

林业技术的创新将重新定义我们管理和保护森林的方式。

Paint with your heart, and your hands will follow.

The power elite is composed of men whose positions enable them to transcend the ordinary environments of ordinary men and women; they are in positions to make decisions having major consequences.

没有远见的技巧是空洞的，没有技巧的远见是盲目的。

Natural experiments can provide valuable insights into economic questions.

We are all prisoners of our own experiences, and no one can truly understand another's pain.