Are you remembering what it is used for, or the sound it makes when the teacher writes on the blackboard?

你记得它的用途或者当老师在黑板上写字时它发出的声音吗？

youdao

We choose this hotel because the price for a night here is down to $20, half of what it used to charge.

我们选择这家酒店是因为这里一晚的价格已经降到了20美元，是以前价格的一半。

youdao

He really asking for you to help him by giving him some money but what is it used for?

他实际上是在寻求你们的帮助，请求给一些钱，但它会用于什么呢？

youdao

In general, it can probably be said that the conservative does not object to coercion or arbitrary power so long as it is used for what he regards as the right purposes.

FORBES: Justice Antonin Scalia: Man On the ObamaCare Margin

Investors lock in their money for ten years, and do not hear much about what it is being used for or how it is performing until the fruits are harvested.

ECONOMIST: Money to burn

Their work is influenced by politics and patrons, regional assumptions and religious beliefs, all of which jostles with the science in determining what a map looks like and what it is used for.

ECONOMIST: A history of mapmaking: Views of the world | The