I could not answer.

我无法回答。

youdao

I am ashamed that I could not answer the question.

我很惭愧不能回答这个问题。

youdao

The question baffled me completely and I could not answer.

这个问题把我彻底难倒了，我答不出来。

youdao

I decided not to answer it because wild horses could not drag me away from the television.

VOA: special.2009.07.12

The problem is that's not an answer I could live with.

但问题是，我接受不了这个答案。

耶鲁公开课 - 心理学导论课程节选

So, "Can I survive my death?" Is like asking, "Could I not have yet died after died " The answer is, of course, you have to have died if you died and you haven't survived if you've died.

所以,我能从死亡中幸存下来么,就成了,我死了之后还能活着吗,答案很明显,既然你死了那就是死了,没能幸存下来就是死了

耶鲁公开课 - 死亡课程节选

The identity of his father would remain Daphne's secret, another of the questions to which I could not find an answer.

NPR: One Boy's Heroism in the Face of AIDS

While it is true that whether or not I could make the Manchester United football team is a yes or no answer, that does not mean my chances as a 39-year-old flappy scientist are 50:50.

ECONOMIST: Against the prevailing wind

An answer of "I do not know" is unacceptable and I could only get insurance on nominating one.

BBC: NEWS | Programmes | Inside Money | Have your say: insurance 'fronting'