可持续发展不仅仅是一种趋势，更是我们对后代的责任。#

The past is always tense, the future perfect.

The best way to buy a stock is when it's cheap, and the best time to sell is when it's expensive.

Policy should be based on evidence, not ideology.

What has destroyed every previous civilization has been the tendency to the unequal distribution of wealth and power.

I write to make the invisible visible.

打字机要是敲得有感情，并不比你的姐妹或者亲戚弹奏钢琴来的扰人。