言论自由是自由的重要堡垒；它们共同繁荣和共同消亡。

Attention is the taking possession by the mind, in clear and vivid form, of one out of what seem several simultaneously possible objects or trains of thought.

一本书是作者和读者之间的对话，一种超越时间和空间的对话。

You can do anything you set your mind to, man.