The Lady's talent has to be spent in order to fulfill the covenant of the trust between the master and the servant.

小姐的才能必须要利用,按主人和仆人之间的信任契约去做。

耶鲁公开课 - 弥尔顿课程节选

So in order to rotate a double bond, you have to actually break the pi bond, so essentially what you're doing is breaking the double bond.

为了能够旋转双键，你必须打破一个π键，本质上我们要做的就是打破双键。

麻省理工公开课 - 化学原理课程节选

So, part of what goes on when you learn, is you have to learn the language --the phonemes that your language has.

因此你在学习语言时要做的一件事情便是,你必须学习你所学语言的各种音位

耶鲁公开课 - 心理学导论课程节选

And then you've got to be willing to do the things you must do.

然后你必须对要做的事情有兴趣。

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选

You take all the risky assets ... and you analyze them first to get their-- you have to do a statistical analysis to get their expected returns, their variances, and their covariances.

你需要对所有的风险资产进行分析,首先要得到它们的-,你必须要做一个统计分析,算出它们的预期收益率，方差，和它们的协方差。

耶鲁公开课 - 金融市场课程节选

I mean, you should not imagine when I say slaves--just take out of your mind the plantations of the old South, because when you only have one or two slaves, the master is working right alongside them, doing exactly the same work that they are doing, and also instructing them and telling them what's what.

我的意思是,当我们提到奴隶的时候,大家不要想当然地联想到南部种植园,因为当你只有一两个奴隶时,奴隶主必须要和奴隶一起劳作,做着和奴隶一样的农活,并且不断告诉他们要做什么

耶鲁公开课 - 古希腊历史简介课程节选

All right, so I did this not at all purposely, but this can point out for you that you need to make sure that the number of electrons that you have in your molecular orbital does match up with the total number that you have in your atomic orbitals.

我并不是故意这么做的，但这告诉我们必须要保证,分子轨道里的电子数,和原子轨道里的,总电子数能对上。

麻省理工公开课 - 化学原理课程节选

But in order to do so, you have to use terms like "punishment" and "reward" and "reinforcement" in such a vague way that in the end you're not saying anything scientific.

但如果你要这样去做，你就必须将惩罚，奖励“,强化之类的术语概念模糊化,最终你所作出的解释便毫无科学性。

耶鲁公开课 - 心理学导论课程节选

We make software; we make technology; we're innovative ,but so are they So, what we really have to do is become a lot more productive and we have to make our companies a lot more competitive. Today, I feel we're losing that edge.

我们生产软件；发展工业技术;,我们有创新能力，但他们也有,所以，我们现在必须要做的就是提高生产效率,我们必须提高我国公司的竞争力,现在，我觉得在这方面我们正在丧失竞争优势。

耶鲁公开课 - 金融市场课程节选

So, many people have relatives they know of that have had to have their heart imaged -- heart disease is a major problem in the United States, and there's a good chance that they had Cardiolite given to them to help in that imaging process.

它被用在心脏成像中,很多人都有一些亲戚他们-,必须要做心脏成像，心脏病已经是美国的一个主要问题,而很有可能他们就要用到Cardiolite来成像。

麻省理工公开课 - 化学原理课程节选