This turns out to be a hard problem.

这其实是一个很难的问题。

youdao

That's a hard problem.

这是个困难的问题。

youdao

Clustering has historically been a hard problem to solve.

集群一直以来都是难以解决的问题。

youdao

"Now,the degree which will have on the peace process and other things which are sort of the hard facts of the Middle East,is something else, altogether,as obviously there is a very serious problem with the Israeli government and so on.

VOA: standard.2009.05.09

It's a problem set where we've worked pretty hard to write some problems that we think will provide you with a good learning experience.

我们为了写出这个问题集,让大家好好学习下课没少侠功夫,你们应该通过材料来学习学习它。

麻省理工公开课 - 计算机科学及编程导论课程节选

And the problem, in 1968 it was very hard to build a barricade across the Boulevard St. Michel, which was built by Hausmann at this time.

而在一九六八年,在圣米歇尔大道上,构筑街垒都是很困难的,那条大道就是豪斯曼建造的

耶鲁公开课 - 1871年后的法国课程节选

It is a hard problem, but it is time we do a better job solving it.

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Imported inflation is not a hard problem to deal with.

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Yet the economy was a hard problem to hide.

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