"Understanding the immune system is understanding the key to unlocking new cancer therapies."

The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.

法律体系的概念预设了规则的概念。

挑战在于创造既实用又富有诗意的建筑。