I meet a problem difficult to solve.

我遇到一个难以解决的问题。

youdao

In itself, it's not a difficult problem to solve.

这本身并不是个难解决的问题。

《牛津词典》

To anticipate every imaginable driving situation is a difficult programming problem.

预测每一种可能的驾驶情况是一个困难的编程问题。

youdao

But for people who have a difficult time controlling their movements, this little navigational issue can be a really big problem.

VOA: special.2011.04.18

It shouldn't be difficult to see a kind of problem that is beginning to arise in Milton's text here.

这是一个很容易看出的问题,在弥尔顿的作品中也被提了出来。

耶鲁公开课 - 弥尔顿课程节选

In fact there's research-- for example, this was done with internists, doctors, who are giving a very difficult, very difficult question connected to a liver problem that an individual patient had.

实际上有这样一项研究-,在内科医生，医生中间进行，向他们提出一个，与肝脏问题有关的很困难的问题,那是一个病人的病症。

哈佛公开课 - 幸福课课程节选

Mr. ZOELLICK: This is a devil of a difficult problem.

NPR: U.S. Relationship with Sudan a Balancing Act

That was before the FTC announced last October it was launching a nationwide contest to get the public's help in solving a difficult problem.

CNN: Two win contest aimed at blocking robocalls

We had a technology company come to us some time ago, before the tech bubble burst, with a difficult problem.

FORBES: Financial Analysts: Writing Research That Benefits Their Employers and Themselves (August 1, 2001)