真相是，生活既美妙又可怕，既迷人又恐怖，既甜蜜又苦涩，这就是一切。

Collaboration across the supply chain is key to driving real change.

A philosophical problem has the form: "I don't know my way about."

PID控制器是控制工程师的通用工具，适用于各种各样的过程。

These walls are really interesting. At first you hate it, then you get used to it. After a considerable period of time, you will depend on it.