If you don't know your cholesterol level, it's a good idea to have it checked.

如果你不知道自己的胆固醇水平，最好去查一下。

《柯林斯英汉双解大词典》

I know your bikes have a very good reputation here, but you have to build up a reputation and market it in Africa.

我知道你们的自行车在这里名声不错，但是你们必须在非洲树立声誉并进行销售。

youdao

You should try to have a good relationship with your neighbors, because you never know when you may need their help.

你应该努力与你的邻居保持良好的关系，因为你永远不知道什么时候会需要他们的帮助。

youdao

In a poker game you do not want to let your opponents know if your cards are good or bad.

VOA: special.2009.11.22

So, you know, you can start writing your own kind of, Miss Manners book, if you like, I mean, are what are good programming, you know-- I wonder what you'd call them, John, good programming hygiene?

因此，你知道，你现在可以开始写,自己的女士礼仪书籍之类的东西了，如果你喜欢我这么说的话，其实我的意思是，写一些关于优秀编程习惯的东西？

麻省理工公开课 - 计算机科学及编程导论课程节选

and to know your weak spots and know like... just practice stuff that you're not very good at.

知道自己的弱点在哪里，知道…就练习不太擅长的那些。

收到了录取通知书 - SpeakingMax英语口语达人

You know what looks good on you, you know your face.

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If you're a frequent flier who has been wronged by incompetent airlines, you may find it a good investment to let you know if your bag is in Frankfurt when it's supposed to be in Rome.

CNN: 5 fun and odd gadgets from CES

Though your digital footprints can bite you, it's good to know they can also help advance your career.

FORBES: Magazine Article