I realized that many of them were hard to answer, and perhaps others could not be answered at all.

我意识到有许多问题很难回答，也许还有一些根本无法回答。

youdao

It is a simple-sounding question, but devilishly hard to answer.

这问题问起来似乎很简单，却极难给出答案。

youdao

The reason the question is hard to answer is because it is vague.

这个问题不好回答，因为问题的起因就是含糊的。

youdao

It's not really hard. You just make your bed neat, remember to stand up straight, and always answer every question with "Yes, Drill Sergeant."

VOA: standard.other

It's hard to answer questions and whatnot and you don't necessarily have access to the same tools unless you yourself go through the process of configuring your machine manually by following many long sequences of steps.

所以很难说会出现什么情况,你们不能,用同一台机器，除非你们自己按照一系列,冗长的步骤手工配置,你们自己的电脑。

哈佛公开课 - 计算机科学课程节选

He's trying extremely hard to make an answer, and what he ends up doing is bringing that knowledge that he built up in Chicago, the knowledge that he gets from reading economics and sociology and Marxism.

他在里面倾其所学，让她明白,甚至用马克思主义,经济学和社会学中。

耶鲁公开课 - 1945年后的美国小说课程节选

But questions like that are hard to answer, so people are deciding to just buy anyway.

CNN: Wary Americans stock up on supplies

They are hard to answer in one volume and Mr Whitfield does not do well against the odds.

ECONOMIST: You don’t have to be Jewish to live there | The

It has made it hard to answer the following simple question: how much money has the Bank created by quantitative easing?

BBC: The Bank abandons a lot of hope