你需要点什么使你高兴起来，我知道什么正合你的需要。

You need something to cheer you up—I know just the thing!

《牛津词典》

一个挥之不去的问题阻碍了许多新企业的脚步，即“我为什么需要它？”或者，也许更能说明问题的是，“为什么你需要知道这个？”

The persistent question of "Why do I need that?"—or, perhaps more tellingly, "Why do you need to know that?"—dogs the steps of many new ventures.

youdao

一个挥之不去的问题是“我为什么需要它？”——或者，也许更能说明问题的是，“为什么你需要知道这个？”——-阻碍了许多踏入新的冒险的脚步。

The persistent question of "Why do I need that?"—or, perhaps more tellingly, "Why do you need to know that?" —dogs the steps of many new ventures.

youdao

Then, you've got to say, "What do I have to know about this object at the initial time?

然后,也许你会问,我需要知道物体初始状态的哪些信息呢

耶鲁公开课 - 基础物理课程节选

So what I decided is that you need to know the whole book in the sense that you need to know all of the key terms and key points.

所以我决定了,我把掌握整本书的要求改为,你需要知道所有的关键词和关键点

耶鲁公开课 - 金融市场课程节选