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.

自动控制的根本问题是在存在干扰的情况下维持期望状态。

我们衡量成功的标准不应只是生产了多少桶油，还应包括避免了多少排放。

I'd rather be anything but ordinary.

In the pharmaceutical industry, patience and persistence are as important as scientific breakthroughs.

每次失败都会受伤。但你必须重新站起来继续前进。