We have no clue as to why he shot them.

我们不知道他为什么要向他们射击。

The police have no clue to his identity.

警察没有可以确定他的身份的任何线索。

I have no clue what you are talking about.

我就更不知道你在说什么了！

I have no clue. But look. I balance it here.

我不知道，但是，看，这样使它平衡。

I have no clue!

我一点头绪也没有。