技术应该是无形的。当它运行得最好时，你甚至不会注意到它。

I've learned that you can't control everything, but you can control how you react to it.

The end of law is not to abolish or restrain, but to preserve and enlarge freedom.

True sustainability means leaving the land better than we found it for future generations.

希望在任何困难中都能找到。