这是因为一本书可以具有多个作者，如清单1所示。

This is the case because a book can have multiple authors, as shown in Listing 1.

youdao

你不能因为一本书的封面而决定它的好坏，从来都不可以。

You can't judge a book by it's cover, ever.

youdao

这全都是因为一本书的出版，而这本书他也没能在活着的时候看见其出版。

And he did it with a book that he never lived to see published.

youdao

So, give me two more minutes, I'm going to end, and a few of you, faces, I've heard this before, people that I know; but, I guess one reason why I'm in history--well, because I read a book a long time ago.

所以,再给我两分钟,我就要结束了,你们有些人,面孔,这我见过,有的人我认识,但是,我觉得我之所以搞历史,因为我很久以前读过一本书

耶鲁公开课 - 1871年后的法国课程节选