这是个难题。
This is a difficult question to answer.
这是个难于回答的问题。
This is a difficult question. Let me see.
这个问题比较难，让我想一想。
MF: This is a difficult question to tackle.
MF：这个问题很难回答。
This is a difficult question, and I have studied it for years.
这是一个棘手的问题，我研究了多年。
A: This is a difficult question, and there are no universally valid answers.
答：这的确是一个难题，而具有普遍性的答案并不存在。
This is a difficult question. We should perhaps recommit to the whole meeting.
这个问题很棘手，我们也许应该向整个会议重新提出讨论。
This is a very difficult question!
这是一个很深奥的问题！
This is a very difficult question to state.
这是个非常困难去陈述的问题。
This is a notoriously difficult question.
这是一个极难的问题。
This is too difficult a question for him to answer.
这个问题对他来说太难回答了。
This question is a bit difficult, but I believe that you have the ability to solve it!
这个问题有点儿难，但我相信你有能力去解决它！
This is a very common question, but I think give answer is very easy, if really wanna explain is quite difficult.
有个很普通的问题，回答容易，若要解释却很难。
It seems to him that this question is a little difficult.
对他来说这道题好像有点难。
This is such a difficult question.
这是一个如此难的问题。
Tommy: This is a hard question, since it is difficult for me to evaluate myself.
黎志安：这是一个很难回答的问题，我很难评价自己。
It is difficult to find a solution to this question.
这个问题很难找到解决办法。
This question is a bit difficult, try to think about it.
这个问题有点难，再想一想。
This is really a difficult question for teachers to answer.
这对老师来说实在是一个难以回答的问题。
Because this question is a difficult one.
因为这个问题本身很难。
This is a very difficult question.
这是一个很难决的疑问。
This is a very difficult question.
这是一个很难决的疑问。
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