If you can't answer the question, leave a blank.

如果回答不了问题，就空着它。

《牛津词典》

If I could just pick up on a question you raised earlier.

请允许我重提一下您早先提出的问题。

《牛津词典》

Rarely, if ever, does he sidestep a question.

他很少回避问题。

《柯林斯英汉双解大词典》

Even if that could be done, there was the question of what to do with the freed slaves.

VOA: special.2009.04.16

So there was a good question in Wednesday's class about the de Broglie wavelength and if it can actually go to infinity.

在周三的课上有个关于德布罗意波波长的问题,非常好，就是它能不能到无穷大。

麻省理工公开课 - 化学原理课程节选

And if they can't answer that question, I say well, before you even run it, have an answer to that.

如果他们没法回答这个问题的话，我会说好吧，在你运行实验之前，先回答这个问题吧。

麻省理工公开课 - 计算机科学及编程导论课程节选

Er, possibly not, if question time in the Lords today is any guide.

BBC: Severn Barrage debate takes off in Lords

"If the question has become when, and not if, a lawsuit will be filed against Moody's, then the shares are simply unbuyable, in our view, " an analyst at US investment firm BTIG, Mark Palmer, told Reuters.

BBC: Moody's shares fall amid rating agency legal fears

If you question the effectiveness of avoiding mistakes then consider this: if your portfolio loses 50%, you need to earn 100% just to break even.

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