The truth is often hidden in the shadows, and it takes courage to find it.
语言是存在的家园。
数学家的工作永无止境;总有更多的问题需要解决。
所有老人共同的大秘密是,在七八十年里,你其实并没有改变。你的身体变了,但你一点都没变。
The United States is the most powerful country in the world, and it will remain so for the foreseeable future.