Gas phase single atom. So we don't have to deal with work function or any kind of energies associated with some condensed form of matter.

气相的单原子，所以我们不需要再,处理功函数的问题,以及和凝聚态相关的能量问题。

麻省理工公开课 - 固态化学导论课程节选

since all the information is in the current price, you don't have to worry about whether it went up or down yesterday, to decide what it's going to do today.

因为当前价格代表了所有信息，你就不需要去考虑昨天股价,是涨了还是跌了，再去判断它今天的价格会怎么变化。

麻省理工公开课 - 计算机科学及编程导论课程节选

People knew that a lot of bad loans were being made or loans were being made to people who shouldn't be getting them.

人们知道现在银行有很多坏账产生,或者有很多多贷款再贷的时候就根本不需要人们来还它。

耶鲁公开课 - 金融市场课程节选

You don't need to say anything more about the phosphate because they all have the phosphate and every set of these is hooked together in the same way.

不需要再进一步说明磷酸基,因为两种核酸都含有磷酸基,并且以同样的方式相互连接

耶鲁公开课 - 生物医学工程探索课程节选

So, I brought up this idea, "What if we could just use SMS? You could send what you're doing. It will go out in real time to all the people who are interested in hearing it. And then, it would be archived on the Web. You could also enter it from the Web and it would be device-agnostic.

所以我提出了这样的想法，如果我们只使用短信息会怎么样？,你可以发送你正在做的事，它会立即,让每个有兴趣听的人都看到，接着，它会在网上存档，你还能再网上读到它,而不需要设备支持。

斯坦福公开课 - Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选

If you know one language, you don't necessarily know another.

如果你掌握了一种语言,你就不需要再去掌握其他的语言了

耶鲁公开课 - 心理学导论课程节选

- There are a few equations that you need to memorize -- those are the very simple -- very, very simple equations, such as e equals h times nu -- hopefully you don't have to sit down and try to memorize that, hopefully we all know that already.

只有几个公式是需要记住的-,它们都非常简单，非常非常简单，比如，E，等于，h，乘以，ν,希望大家不需要再专门去背了，希望我们已经都记住了。

麻省理工公开课 - 化学原理课程节选

Again it doesn't require the effort that you'll need in 55 or in English 10A.

再一次它不需要你像55号课和10A号英语课那样的努力。

哈佛公开课 - 幸福课课程节选