1. 它自己;它本身
Itself is used as the object of a verb or preposition when it refers to something that is the same thing as the subject of the verb.
e.g. Scientists have discovered remarkable new evidence showing how the body rebuilds itself while we sleep...
科学家们已经发现了令人瞩目的新证据,说明了人体在睡眠状态下是如何自我修复的。
e.g. Unemployment does not correct itself.
失业问题不会自行解决。
2. (表示强调)自身,本身
You use itself to emphasize the thing you are referring to.
itself的解释
e.g. I think life itself is a learning process...
我认为生活本身就是一个学习的过程。
e.g. The involvement of the foreign ministers was itself a sign of progress...
外交部长的介入本身就是取得进展的一个标志。
3. (加在抽象名词之后)极度,非常
If you say that someone is, for example, politeness itself or kindness itself, you are emphasizing they are extremely polite or extremely kind.
e.g. I was never really happy there, although the people were kindness itself...
我在那里从来没有真正高兴过,虽然那里的人们非常亲切。
e.g. Many men are charm itself...
许多男人非常有魅力。
4. an end in itself -> see See end