电脑是用来查寻信息的 怎样用英语翻译?

能不能用look up?
为什么?

Computers are used for searching information.
use 作动词“用”和for搭配表示适用于...
Hammer is used for driving in nails. 锤是用来敲钉子的。

对“问题补充”的补充:
look up 有用眼睛看，找的意思。
search 是搜寻， 查找的意思。

Computers are used to search information.

你可以试一试

http://www.dict.cn/

Computers are used to finding information. look up用于翻阅或查阅字典 人做主语 eg:If you don't know the meaning of the word,you can look up the dictonary.