这个规定也已经用于购买使用过的轮胎和内胎。

This rule has also been applied in the case of a purchase of used tyres and tubes.

《柯林斯英汉双解大词典》

我们不能扔掉用过的电池。

We can't throw used batteries away.

youdao

中国每月产生使用过的口罩16.2万吨。

There are 162,000 tons of used masks every month in China.

youdao

I used it so that they could record all of the books that they read about Japanese culture.

我用它是为了让孩子们能记录下,他们读过的所有有关日本文化的书。

麻省理工公开课 - 媒体、教育、市场课程节选

And we can calculate that with the formula that we used, which was just n minus l minus 1 equals the number of nodes.

这个我们可以用我们以前用过的那个公式来计算，也就是节点数等于ｎ减去ｌ减去１

麻省理工公开课 - 化学原理课程节选

That will lead me to use a technique I mentioned again last time, called memoization.

这就使得我要是,用我上次提过的一种技术，也就是默记法。

麻省理工公开课 - 计算机科学及编程导论课程节选