Beats me.

问倒我了。

I have no idea.

我一点都不知道。

You got me.

你可问住我了。

I haven't a clue.

我没线索。

Search me.

你搜我身好了。

Your guess is as good as mine.

我猜的跟你一样,没谱。

Who knows?

谁知道呢?

I couldn't tell you.

我没法告诉你。

It's beyond me.

这超出了我的理解范围。

That's a good question.

这问题问得好。

I'm stumped.

我被难住了。

How should I know?

我怎么会知道?

That's a tough one.

这个嘛,不好说。

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