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。
Thus how to solve them is significant in both theory and application.
因此，研究求解它们的方法具有重要的理论价值与现实意义。
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。
What problems exist and how can the engagement support the client to solve them?
存在哪些问题？ 项目如何支持客户端来解决这些问题？
She advised them how to solve the problem.
她给他们出主意怎样解决这个问题。
She advised them how to solve the problem.
她给他们出主意怎样解决这个问题。
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