We know what censorship is. Censorship is the banning of books that have been published and that have been deemed by the state authorities to be dangerous or harmful in some way.

我们知道什么是控制，控制就是,禁止已经出版的书籍和被政府认为,在某些方面非常危险和有害的。

耶鲁公开课 - 弥尔顿课程节选

Ninety-percent of all the books that were published before Peter were devotional texts in the church.

彼得之前的百分之九十的书籍,都是教堂里的祈祷文

耶鲁公开课 - 欧洲文明课程节选