如果你不懂这点，对它的解读就会误入歧途。

If you don't know that, interpretation can go far astray.

youdao

但是如果你不懂这些，在生活中学习也没什么可羞愧的。

But if you don't know them, there's no shame in learning them at any point in your life.

youdao

如果你不懂题意，你可以举手让老师重复一遍。

If you do not understand the question, you should raise your hand and ask the teacher to repeat the question.

youdao

So if you run into a problem set that just, you don't get, all right? Seek help. Could be psychiatric help, could be a TA. I recommend the TA.

所以如果你碰到了一个,你不懂的问题，好么？求助，可以是精神科，可以是一个助教，我推荐助教。

麻省理工公开课 - 计算机科学及编程导论课程节选

You know, I think that, don't be upset if you don't understand.

我想如果你看不懂，不必灰心。

要想成为读书达人 - SpeakingMax英语口语达人

And if you speak other languages that I don't, you can nonetheless compel me to speak them at least in subtitle form.

如果你不懂英语的话，那也只能,改变下字幕了。

哈佛公开课 - 计算机科学课程节选