随着年龄增长，我越发意识到自己知之甚少。

我不是一个喜欢回头看的人，我总是向前看。

I don’t do features, I do favors.

Sometimes the hardest thing and the right thing are the same.

The state, therefore, has not existed from all eternity. There have been societies that did without it, that had no notion of the state or state power. At a certain stage of economic development, which was necessarily bound up with the split of society into classes, the state became a necessity.

Sustainability in chemical manufacturing isn't an option—it's our responsibility to the next generation.

最好的学习方法是去做，犯错误，然后从中学习。