1、off是关，on是开。off是一个英语单词，可以用作介词、形容词、副词、动词、名词，意思是起跑或者杀死。

2、off是一个英语单词，可以用作介词、形容词、副词、动词、名词，意思是起跑或者杀死，例如“But now it was cut off.”。

3、例句：The complexity of things has become so overwhelming that we want to turn it off.这些东西变得太复杂了，搞得我们简直想干脆把它们关掉。

But now it was cut off.但现在被砍下来了。