But challenges remain. And we know how to solve them.

我们仍然面临诸多难题，但我们知道应当如何解决这些难题。

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He says there should be more research into the problems and how to solve them.

他说应该有更多深入问题和有关解决方法的调查。

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It also provides Suggestions on how to solve them to improve performance. It contains three main sections.

本文还提供了关于如何解决这些问题以提高性能的一些建议。

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As one of the foremost experts on economic crises--and how to solve them--my next nominee, Christina Romer, will bring a critically needed perspective to her work as chair of my Council of Economic Advisors.

FORBES: Magazine Article

And we know how to solve them.

WHITEHOUSE: 2012 State Of The Union Address Enhanced Version

In contrast Amre Moussa, the secretary-general of the Arab League, and Prince Saud al-Faisal, the Saudi foreign minister, both made warmly received speeches admitting to problems in the Arab world but urging America to let Arabs decide how to solve them.

ECONOMIST: Arab-Americans: That patronising tone | The