树种多样性不仅仅是生态学，它是我们地球肺部的风险管理。

The psychologist must avoid all forms of mental chemistry.

A people without children would face a hopeless future; a country without trees would face a future with even less hope.

The Internet should be a tool for empowerment, not control.

劳动力市场比传统模型假设的更具适应性。

在展览制作中没有中立的空间。