一旦认识并喜欢上他们，我们就会想我们当时如果错过了这个机会，那该有多糟糕。

Once having met and liked them, we think how terrible it would have been, had we missed the chance.

youdao

如果错过了机会，可以点击这里观看视频文件。

If you missed it, you can watch a video here.

youdao

如果错过机遇，今后可能就要花费更大的气力。

“If we miss this opportunity, then we may have to make even more efforts further down the road, ” he said.

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

So sometimes, if you miss a class, you can just kind of check in earlier years, like lectures,

所以有时候，如果你错过了一节课，你可以看看前几年的讲座，

开放式的课程？ - SpeakingMax英语口语达人

Oh, yes. And, of course, the Webcast is available so that if you miss something during lecture, or if you miss lecture altogether you can go to the website, click on Webcast and follow what happened in lecture.

哦，还有，当然，网络视频是可以利用的,所以如果你们在课堂上错过了什么，或者你们连上课都错过了,你们就可以去上这个网站，点击视频，观看课堂里呈现的。

麻省理工公开课 - 固态化学导论课程节选