If you don't have the units, then if you say the answer is 19, then we don't know what it means.

如果没有的话,比如你的答案是十九,那我们就不知道这是什么意思

耶鲁公开课 - 基础物理课程节选

And class size is pretty small if you go up to, you know, advanced level classes.

班级挺小的，如果，你知道，你去上高级课程的话。

要考入大学 - SpeakingMax英语口语达人

You've all been immunized for Hepatitis B, would you be happy to hear that that's where your Hepatitis B vaccine came from?

你们都对乙型肝炎具有免疫力了,如果你知道你的乙型肝炎疫苗,是从何而来的话,你还会高兴的起来吗

耶鲁公开课 - 生物医学工程探索课程节选

Cause when you can actually manipulate a computer's memory at this low level, you can steal people's passwords, you can steal their data if you know how that memory is laid out.

因为即使是在这么低的权限下,你也能熟练控制电脑的存储器,你就可以窃取别人的秘密，如果知道相应数据位于哪里的话,你也能窃取别人的数据。

哈佛公开课 - 计算机科学课程节选

If you know that, it's kind of divided between the UK and Norway.

如果你知道的话，它是由英国与挪威共同开发的。

耶鲁公开课 - 金融市场课程节选

bug And maybe by understanding why it worked on a and not on b, you'll get a lot of insight that you won't if you just focus on the bug.

发现很多东西，而你只关注,本身的话就发现不了这么多东西,如果知道你的程序至少还对。

麻省理工公开课 - 计算机科学及编程导论课程节选

Suppose that there were some sort of genetic marker and, although we didn't have a tattoo that you would just have to look at, -- but you could have genetic counseling-- have your DNA examined and you could tell, if you had the DNA testing, how much time you had left.

假设有某种基因标记，虽然我们没有,让你不得不去看的在身上的标记了，但你可能会去做基因咨询-,检查你的DNA，如果你做了DNA化验的话，你就能知道自己还剩多少时间。

耶鲁公开课 - 死亡课程节选

If you go onto study immunology you'll learn that this is one of the most important and rapidly evolving areas of the study of immunology.

如果你要继续学习免疫学的话,你就会知道这是免疫学中,最为重要而且高速发展的一个研究领域

耶鲁公开课 - 生物医学工程探索课程节选