这件事决心难下，但我们决定冒险一试。

It was a difficult decision but we decided to risk it.

《牛津词典》

我听说你在桥上勉强逃过一难。

I hear you had a very narrow escape on the bridge.

《柯林斯英汉双解大词典》

跳伞给你一生难求的刺激感觉。

Parachuting will give you the rush of a lifetime.

《牛津词典》

But I want you guys to think about why it was difficult to do it another way, which is more pedestrian.

但是我希望你们能思考一下,为什么用另一种更普遍的方法来做,反而会比较难呢

耶鲁公开课 - 基础物理课程节选

Yeah, but I think it's also an important skill. You need to be able to express what you know

难，但是我也觉得这是一种重要的技能。你必须能够把你知道的表达出来，

沟通很重要 - SpeakingMax英语口语达人

Because it's hard when you go back being part of any group. Once you are in that group, and away from other people, it's very hard to remember We've talked that -Oh, have you?

因为如果你回到原来的群体中,就会变得难了，因为你只要一呆在那个群体中，远离其他人，就很难,我们聊过这个，-是吗？

普林斯顿公开课 - 人性课程节选