It is easy to raise such questions, but difficult to answer them with any degree of assurance.

提出这样一些问题是容易的，但却难以给它们作出有任何把握的回答。

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The researcher noted that the dolphin is quite eager to press the paddle when it was sure of the answer, but exhibited hesitation during difficult trials.

研究人员注意到，海豚在确定答案时会很着急地按下踏板，但在难度高的测验中则表现出犹豫。

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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.

现在，估计这是最难回答且最有争议的问题了，但是这一点值得我们深思。

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Now, that's actually a difficult question to ask-- to answer for a child, but I tried my best to give him an answer.

向一个孩子解释这个问题其实挺困难的，但我还是尽力给了他一个答案。

耶鲁公开课 - 心理学导论课程节选

Identifying the world's greatest male athlete turned out to be easy to argue but difficult to answer empirically.

WSJ: The World's Greatest Athlete?

So, I think this question will be fun to answer, but it may be difficult to answer.

FORBES: Ask the Readers: How Much Do You Spend on Fun?

McPhee, like any good defense attorney, is trying to make a case for her client but the government is making it difficult and did not provide an answer to which texts they found most offensive.

FORBES: Former BP Engineer Kurt Mix Asks For Charges Against Him To Be Dismissed