This is the way where you can know that you will have an effect.

通过这种方式，你可以清楚地知道,你将会起到作用。

普林斯顿公开课 - 人性课程节选

What makes this enterprise difficult but also riveting is that moral and political philosophy is a story and you don't know where the story will lead.

这一过程会充满挑战又引人入胜,因为道德与政治哲学就好比一个故事,你不知道故事将会如何发展。

耶鲁公开课 - 公正课程节选

Computing square root. I'm going to capture it in a piece of code, I'm going to be able to refer to it by a name, and I'm going to suppress the details, meaning inside of that computation, you don't need to know what it does. You just need to know, if I give it the right kind of input, it'll give me back an input that satisfies the contract that I set up.

比如计算平方根,我会用一段代码来说明,我将给它命名,并且忽略细节,意思就是在这一段计算过程中,你不用知道它做了什么，你只需知道，如果我进行了正确的输入,它将会给我符合条件的输出。

麻省理工公开课 - 计算机科学及编程导论课程节选

So, you send it off to a middleman who does the turning of the grapes and the olives into the liquids that are necessary, and he takes a good bit of the profit.

你可能会将它们卖给中间商,他们知道如何将葡萄和橄榄榨成液体,然后从中收取可观的利润

耶鲁公开课 - 古希腊历史简介课程节选