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》

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

有人预测，今年中国将产生16.2万吨使用过的口罩。

Some people make a prediction that there will be 162,000 tons of used masks in China this year.

youdao

It turns out there's a new function strlen S-T-R-L-E-N that you probably have not used yet called strlen, S-T-R-L-E-N, programmers early on and still like to be succinct but communicates sufficiently what they mean.

结果这里有个新的函数,你可能没有使用过，叫做，早期的和现在的程序员喜欢简洁地,但是能充分的传达他们的意思。

哈佛公开课 - 计算机科学课程节选

Use this pattern in any situation where you want to explain you've done it before.

当你想解释之前已经做过某事的时候，可以在各种情形下使用这个句型。

I've already 课堂 - SpeakingMax英语口语达人

I don't have to go read what it printed out in the screen. This has returned a value that I can use. Because I could do a test to say, is this a return value? If it's not, I'll do something else with it. So the binding is still there, it simply doesn't print it out.

我不想读到屏幕中打印出来的这行字,程序返回过一个我能够使用的值,因为我可以做个小测试，来说明这是否是返回的值，如果不是，我可以做一些其它的事,而这个绑定依然在这儿，没有打印任何东西。

麻省理工公开课 - 计算机科学及编程导论课程节选