I mean, who really knows?

我是说，谁真的知道呢？

youdao

You are the only one who really knows what you want from life and if you're on the right road for you.

唯有你自己知道你人生的追求，以及你是否走在适合你的道路上。

youdao

You need to huddle together with someone who really knows the ropes and can give you good practical advice.

你需要和知道内情、能给你好建议的人在一起。

youdao

That means the song is so old, no one really knows who wrote it.

VOA: special.2009.07.27

Moreover, who really knows what anyone might have done in 1999 (Nextag) or 2004 (Yelp)?

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The only one who really knows is Mark Roy Anderson, 53, the majority shareholder of both of these publicly traded (Bulletin Board) companies, through his Camden Holdings of Beverly Hills, Calif.

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