关键的问题是如何“堕入”地爱？

The key question is just how can one "fall" into love?

youdao

一个关键的问题是在哪里放置诱捕陷阱。

A key question is where to place traps.

youdao

实际上，他们最关键的问题是：你在做什么？

In fact, the critical questions are: What are you doing?

youdao

Should we conclude,therefore, that the key to the important question--namely, What matters? the answer to that question, should we conclude,is,same personality?

我们是否就该得出结论，重要问题的关键，也就是什么是最重要的，这问题的答案就是相同的人格吗？

耶鲁公开课 - 死亡课程节选

But the first key issue is that it's good in and of itself-- almost needs no justification.

但首先的关键问题是快乐本身是好的-,几乎无需辩解。

哈佛公开课 - 幸福课课程节选

I think there is the essence of personal challenge in dealing with that.

我想关于这个问题,个人面对的挑战是关键。

普林斯顿公开课 - 人性课程节选