Peter, beginning again, repeated the three letters till Heidi said, "Now you know them."

彼得又开始重复这三个字母，直到海蒂说：“现在你认识它们了。”

youdao

Do you know them somehow?

你真的认识他们吗？

youdao

You know them as harmonics or overtones.

你把它们当做和声或弦外音。

youdao

And so you are really good friends with like all the people you're in class with, because you know them since like four years and you have all classes together with them."

VOA: special.2009.11.05

You know them as harmonics or overtones.

你把它们当做和声或弦外音。

麻省理工公开课 - 固态化学导论课程节选

So they've got these superhighways which is, I don't know if you've seen them, they are marked on in blue.

所以，他们修了这些高速路，我不知道你见过没有，他们被标成蓝色了。

伦敦的蓝色自行车 - SpeakingMax英语口语达人

You may have read about them, but now you know them, having lived through them.

FORBES: To Build The Next Great Company, Seize On Slow And Sudden Ideas

Don't close your browser window out yet -- we'll walk you through these so that you know them like the back of your hand.

ENGADGET: A guide to Slackware and Arch Linux: getting your hands dirty with Linux

And I think you know them, and the Pentagon described them.

WHITEHOUSE: Press Briefing