allowed与aloud发音相同，若不看文字只听声音，这个标牌就会被误解为“Tospeak aloudisnot aloud(大声讲话不是大声)”，那么，在图书馆便可以喧哗了，真是令人啼笑皆非。

What is the most contradictory sign in a library? To speak aloud is not allowed.

youdao

在图书馆里大声喧哗是十分粗鲁的行为。

Being vociferous in the library is a rude behavior.

youdao

不得在图书馆内喧哗。

You must be quiet in the library.

youdao

不得在图书馆内喧哗。

You must be quiet in the library.

youdao