一个不能解决的问题，无论是两个。

One can't solve the problem, neither two can.

youdao

我不知道。我只是觉得这个不能解决的问题。

I don't know. I think this is an unsolvable problem.

youdao

在你的生活中，你会遇到很多你不能解决的问题，但你要记住是谁与你同在！

All your life you will face big problems that you cannot solve, but you can remember Who is with you!

youdao

The problems that Frost's poetry poses for us as readers are not problems of reference. They can't be solved by footnotes.

他的诗歌给我们的困难,不是参考的问题，它们不能就用脚注解决。

耶鲁公开课 - 现代诗歌课程节选

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

Typically up till now, we've looked at things that can be done in sublinear time. Or, at worst, polynomial time. We'll now look at a problem that does not fall into that. And we'll start with what's called the continuous knapsack problem.

至今为止我们已经处理过,亚线性问题，最多也就是多项式问题,我们现在要看的问题则是不能用这些解决的,我们将要开始讲连续背包问题。

麻省理工公开课 - 计算机科学及编程导论课程节选