他和我已经详细讨论了这一整个棘手的问题。

He and I have talked through this whole tricky problem.

《柯林斯英汉双解大词典》

这是一个棘手的问题，但我认为我们轻而易举地把它解决了。

It was a tricky problem but I think we've licked it.

《牛津词典》

我需要与你谈个有点棘手的问题。

I need to talk to you about a matter of some delicacy.

《牛津词典》

We'll get into some spots where it gets a little trickier, a little bit more complicated later in class.

我们接下来在课堂上,会做一些更棘手，更复杂的问题。

麻省理工公开课 - 化学原理课程节选

There are widespread controversies about it, and many of the courses you would take in law school are meant to try to get to the bottom of these thorny questions.

这个问题有很多争议，法学院的很多课都旨在,把这些棘手的问题弄得水落石出。

耶鲁公开课 - 文学理论导论课程节选

So that you will come away with a sense of what you can do, what you can't do, and what kinds of things you should use to tackle complex problems.

因此你们才能对,你们能做的事儿，不能做的事儿,和用何方法去,解决棘手问题有一个基本概念。

麻省理工公开课 - 计算机科学及编程导论课程节选