You don't know a good thing till it's gone and found someone else.

有些东西只有失去了才懂得珍惜而且已经属于别人了。

youdao

Gossip: Spotted Nate Archibald learning you don't know a good thing till it's gone and found someone else.

目击——n终于明白直到失去一样好东西并且看到她属于另外一个人了，你才会明白。

youdao

Gossip girl: Spotted, Nate Archibald learning you don't know a good thing till it's gone, and found someone else.

目击——n终于大白直到失去一样好东西并且看到她属于此外一个人了，你才会大白。

youdao

While the Heimlich maneuver is a good thing to know, Dr.Gary Smith,a pediatrician, says many foods that are thought to be kid friendly are actually dangerous like grapes,popcorn,nuts, bratwurst and hot dogs.

VOA: standard.2010.02.23

And, that's a good thing to know because if you come out with an answer that's somewhere near the diameter of the universe and it's supposed to be the diameter of an atom, then you will know that you probably made a mistake.

这是我们需要知道的,因为当你做一道题得到的答案,是宇宙的直径,而正确答案是原子直径时，你能很快发现你的错误。

麻省理工公开课 - 固态化学导论课程节选

And I think a really good thing is that, you know, well, I like traveling,

我想真正好的一点是，我热爱旅行，

来自世界各地的朋友 - SpeakingMax英语口语达人

The closest I get to a Marine, you know, that's a good thing to do.

CENTERFORSECURITYPOLICY: "The 'Buck' stops here" on defense cuts

We know that this is a good thing for our fiscal picture.

WHITEHOUSE: Press Briefing

So you know, maybe not the corner of the coffee shop with the PA-on-a-stick sort of thing, but enough good - you know, enough of a good room to shine but that you really are making a connection with people that's very direct.

NPR: Tift Merritt Will 'See You On The Moon'