The real hard part, of course, is solving an open problem.

当然，真正困难的部分还是是解决热点问题。

youdao

So far, for any graph, the Total Coloring Conjecture is still an open problem.

到目前为止，对于一般的图，全着色猜想仍然是一个公开的问题。

youdao

To become professor, you can't have just one discovery or solve just one open problem.

要成为教授，你不能只有一项发现或只解决一个问题。

youdao

Toyota says the problem is rare and caused by accelerator pedals becoming stuck open.

VOA: special.2010.02.05

I know, for a lot of you, it's like, OK, I got a heavy problem. Let's see, def Foobar open paren, a bunch of parameters.

我知道这对你们中的大多数人来说，应该没问题了，好，这儿我碰到了，一个严重的问题，我们看看，一堆参数。

麻省理工公开课 - 计算机科学及编程导论课程节选

On the more hopeful side, the problem is out in the open and recognized as a problem.

FORBES: Academic Isolation, An Old Problem Getting Worse

Tournament director Gilbert Ysern told CNN's Open Court that the problem was acute and a solution needed to be found quickly.

CNN: Roland Garros suffers uncertain future

Given past experience, any conservative politician should recognize that the problem with open immigration into a democracy, especially a democracy with a burgeoning welfare state, is the risk to civil society from an electoral transformation that not only outweighs, but threatens, any long-term economic benefit.

FORBES: The Immigration Debate Is About More Than Trade