如果你们偶然，我知道不太可能，但是如果不小心你们错过了某节课，你们就可以在之后补回来了。

So, if you by chance, I know it's very rare, but if by chance you don't get the class you can always follow up later.

youdao

英国观众们，你们可千万别错过马克在BBC上的节目啊。他是我见过的知识最渊博、最富有娱乐性的英国顶尖天文学专家之一。

For UK viewers, be sure to keep an eye open for Mark on the BBC, he is one of the most knowledgeable and entertaining on-screen UK astronomy talents I've seen for many years.

youdao

我明白这两年我错过的太多了，今天我要再向你们说说为何我决定带领我们一家走上这趟旅程。

I know how much I've missed these past two years, and today I want to tell you a little more about why I decided to take our family on this journey.

youdao

So, if you by chance, I know it's very rare, but if by chance you don't get the class you can always follow up later.

如果你们偶然，我知道不太可能，但是如果不小心你们错过了某节课,你们就可以在之后补回来了。

麻省理工公开课 - 固态化学导论课程节选