1·This is an unanswerable question for me.
这是个我无法回答的问题。
2·That's unanswerable.
这是无法回答的。
3·To my surprise, as I scribbled out the last of my bitter, unanswerable questions and prepared to toss my pen aside, my hand remained poised over the paper, as if held there by some invisible force.
使我吃惊的是，当我写完了最后一个痛苦的、无法回答的问题，准备把钢笔放在一边的时候，我的手好像被一种看不见的力量拉住，悬在纸上不动了。
4·It's one of those questions that seem unanswerable.
这是似乎无法回答的问题之一。
5·As to the question you raised in your last letter, I think that it is unanswerable.
至于你在上封信中提出的那个问题，我认为那是无法回答的。