I have a friend who knows a good club.

我有个朋友知道一家不错的俱乐部。

youdao

We have a biologist who knows a bit of life and human nature;

我们有着一位略晓得一些生命和人类性质的生物学家；

youdao

Now, this already exists as tacit information. Anybody who knows a town has some sense of, "Don't go there."

现在，这些是众人心照不宣的，是熟悉城镇的人都知道的，“不要去那里。”

youdao

Anyone who has studied American history knows that the United States is a democracy.

VOA: special.2009.12.14

Maybe somebody who knows Citizen Kane and would like to have a grade for the first 50 pages.

也许比较清楚了解的同学可以做,需要先读前50页的内容。

麻省理工公开课 - 电影哲学课程节选

I'm going to live here for, who knows how long. Quite a long time.

我打算定居在这儿，不知道多久。会是相当长一段时间。

追忆艾米 - SpeakingMax英语口语达人

Sherif Sabri is a man who knows a thing or two about image and sound.

NPR: Consultants Develop Notion of Branding Nations

Great idea coming from a brand who knows a thing or two about boys and playing.

FORBES: Consumer Insights Are Not Necessarily Good PR Strategies. Just Ask Mattel.

It's run by Kevin Lichtman, 38, who knows a Web stock scam when he sees one.

FORBES: Streetwalker: An optimist on the sidelines