Obviously this is a difficult problem, but the incentive to solve it is very big. The main approaches fall into the following categories.

显然，这是一个很困难的问题，但是解决它的激励也很大。

youdao

I know this is a difficult problem, but do you prepare to face the challenge?

我知道这是个难题，但是你准备好迎接这个挑战了吗？

youdao

This is a difficult problem to solve.

这是一个很难解决的问题。

youdao

This is a difficult problem.

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

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And they have a tremendous amount of capacity of resources to deal with this very difficult problem, but it is a crisis significant enough that a lot of countries, including the United States, led by the United States, have come in to offer further aid and assistance and expertise to help them deal with it.

WHITEHOUSE: Press Briefing