当想要缓存更为复杂的内容时，就需要进行一些权衡取舍了。

The trade-offs come when you try to cache more complicated content.

youdao

当想要基于未知规则给一个类添加任意行为时，则需要使用一项不同的技术。

When you want to add arbitrary behavior to a class, based on unknown criteria, you need to use a different technique.

youdao

那么当想要扩张的时候，由于行业已经收缩了，就会碰到很多瓶颈。

And so the sector shrivels away. And then when you try and expand it, because it's shriveled away, you encounter a lot of bottlenecks.

youdao

To ask questions like how much heat is released in a chemical reaction that takes place at constant temperature.

当我们想要知道,当一个化学反应在恒定的温度下发生时,会放出多少热量时。

麻省理工公开课 - 热力学与动力学课程节选

and I think that was really the turning point for me and my life when I decided that

我想当我决定要把我的余生奉献给戏剧的时候，

纽约的人们 - SpeakingMax英语口语达人

While modern poetry in many of its forms strives to master reality, Auden reminds us, there on your handout, cautiously, that poetry makes nothing happen.

当现代诗歌以其各种方式极力想要操控现实时，奥登提醒我们--这在你们的讲稿上有，要小心诗歌会让人们一无所有。

耶鲁公开课 - 现代诗歌课程节选