我可是万里挑一

I'm one in a million

你是万里挑一的。

You are one in a million.

哇！想想吧，你是万里挑一、亿里挑一、兆里挑一的。

Wow !Stop and think about that. You're better than one in a million, or a billion, or a gazillion...

比方说，目前还无法分辨出雌鲸是如何万里挑一的。

For instance, it's currently impossible to tell how a female swimming through a group of males singing the same song picks out one animal from the rest.