Depending on what kind of chemistry you go in to, you might accidentally memorize parts of the table, which is fine, but what you really want to know how to do is know how to use the periodic table.

取决于你今后从事哪个方向的化学研究，你可能会不经意地记住周期表的某一部分，这就够了，但是要注意,你真正需要知道的是如何使用元素周期表。

麻省理工公开课 - 化学原理课程节选

you have to be well-informed as to how to go about being an actor.

你要消息灵通，知道如何当演员。

想成为明星吗？ - SpeakingMax英语口语达人

And the question is, so how many pigs does he have, and how many chickens does he have? Wow. What a deep problem, right? But you're going to see why we're going to use this in a second. So you know how to solve this, this is a fifth-grade problem, right?

为了避免歧义，这些猪和鸡都是健全的,现在问题是它到底有多少只猪和鸡呢？,多深刻的一个问题啊，对吗？,但是你将要看到的是,我们为什么要举这个例子,你知道如何解答这个问题？

麻省理工公开课 - 计算机科学及编程导论课程节选

This is useful especially when we get to details like forensics and looking at data on a hard drive, - 'cause if you don't know how much store-- how many bits are composing your file, you're never gonna recover that data or be able to access what you're looking for.

这是很有用的，尤其是在法庭上,查看硬盘驱动器里的数据时，如果你连-,文件有多少比特都不知道，你如何去恢复数据,获取你想要的信息呢。

哈佛公开课 - 计算机科学课程节选

You want to look at the effect of a low fat diet.

你想要知道低脂饮食的效果如何

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

If your dealer quotes you a discount rate of 2.51%, you know how to convert that into the price and that's all that matters--all that really matters is the price you have to pay.

如果经销商告诉你折扣率是2.51%,你要知道如何转换成价格,真正和你有关系的,是你需要付多少钱

耶鲁公开课 - 金融市场课程节选

Well, I solve 2 or 3 exponential problems before breakfast every day. You know things like, how to find my way to the bathroom is inherently exponential, but I manage to solve it anyway.

你要知道如何找到,我的浴室就是一个，固有的指数型问题,但是我还是能解决它。

麻省理工公开课 - 计算机科学及编程导论课程节选