It's difficult to answer this question.

回答这个问题太难了。

youdao

I found it a bit difficult to answer this question.

我发现这个问题有点儿难回答。

youdao

Since we have no mechanical picture of the ether, it is extremely difficult to answer this question.

因为我们没有以太的力学结构，所以很难答复这个问题。

youdao

Most lawyers are not technologists, which can make this question difficult for them to answer.

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This is a surprisingly difficult question to answer.

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Now this is probably the most difficult and controversial question to answer, but it is a valuable argument worth thinking about.

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