itself
pron
ɪtˈself pron
1 used to show that a thing, organization, animal, or baby that does something is affected by its own action 自己，自身〔用于表示受本身动作影响而做某事的施动者〕
The cat lay on the sofa, washing itself.
猫躺在沙发上把自己舔干净。
The machine switches itself off when the process is complete.
当工作程序结束后，机器会自动关闭。
a small local enterprise that has transformed itself into a highly successful company
已变得十分成功的当地一家小型企业
2 used to emphasize that you are talking about one particular thing, organization etc 自身，本身〔用以强调某事物等〕
We’ve checked the wiring so the problem may be the television itself.
线路我们已检查过了，所以问题也许出在电视机本身。
3
in/of itself
considered separately from any other facts 本身，本质上
There is a slight infection in the lung which in itself is not serious.
肺部有轻微的感染，这本身并不严重。
4
(all) by itself
a. alone b. without help or without a person making it work 无外力地
Will the dog be safe left in the car by itself?
把狗独自留在车里安全吗？
The door seemed to open all by itself.
那扇门好像是自己打开的。
5
(all) to itself
not shared with other things （全部）为自己所有; 非共用
This idea deserves a chapter to itself.
这个观点值得单独写一章。