我希望这是你永远都用不上的东西，但是去参加一些自卫课程当然是值得的。

I hope it's something you'd never have to use, but it's certainly worth going along to a few self-defence sessions.

youdao

如果你的后院仓库堆积着破旧的割草机、生锈的自行车以及一堆用不上的园艺工具，那么请准备好被惊艳吧。

If your back garden shed is cluttered with a broken lawnmower, rusty bicycles and a range of unused garden tools then prepare to be amazed.

youdao

编程语言的更新速度很快，因此等到他们进入劳动力市场时，他们所学的“Ruby on Rails”编程语言甚至可能完全用不上。

Programming languages have a quick turnover, so the "Ruby on Rails" language they learned may not even be relevant by the time they enter the job market.

youdao

We won't come back to it at least for the moment, but you see that it's mercifully short, and as time passes we will do some rather interesting tricks with it.

至少我们这节课用不上，看，这篇故事很短，过一段时间我们会针对它做一些很有趣的练习。

耶鲁公开课 - 文学理论导论课程节选

Sure, I don't need it at all.

当然，我根本用不上。

Can 实战 - SpeakingMax英语口语达人

I think that this sort of analysis shouldn't be applied to issues of human life.

我觉得这种分析,不应该用在人的生命这个问题上。

耶鲁公开课 - 公正课程节选