Now, the interest rate in Irving Fisher's world has to equate supply and demand in the market for debt.

在费雪的理论里,利率必须与,债券市场的供需关系保持平衡

耶鲁公开课 - 金融市场课程节选

you have to be in your top shape,

你必须保持最好的身材状态，

保持身材的理由 - SpeakingMax英语口语达人

They're these building blocks that support the melody and they have to change for that melody to be consonant all the time.

这些和弦是旋律的基础,和弦的变化必须和旋律保持协调一致

耶鲁公开课 - 聆听音乐课程节选

You have to remain celibate and, as we will see in the coming week, this is important to Milton. You have to remain sober, and you must eat vegetarian .

你必须独自生活，我们会在下周看到，这对弥尔顿很重要，你必须保持冷静，你还必须吃素。

耶鲁公开课 - 弥尔顿课程节选

So who the sender is, so maybe you could keep track of just who your most frequent correspondents are and if you keep seeing the same personfrom person X or person Y coming into your inbox and clearlyI like having a dialog with these people or have to for work, that might in fact bubble up in your inbox.

谁是发送者，你可能会保留最近跟你联系最频繁的人,如果你发现某某人频繁发送邮件给你,这说明你喜欢和这些人保持联系,可能因工作的原因必须保持联系,那么该邮件就有可能，上升到你邮件的最上方。

哈佛公开课 - 计算机科学课程节选

And fairly soon into the conversation I demonstrated some principle that you've probably learned in your physics class having to do with an object at rest remaining at rest unless acted upon by a force.

很快，在交谈中,我就展示了一些原理,可能你们在物理课上学过,要使静止的物体保持静止,必须有外力作用。

耶鲁公开课 - 心理学导论课程节选

But at the time period that we are examining, the period in which he writes Comus, the early 1630s, Milton seems very much interested in remaining virginal forever, avoiding even the sanctioned loss of virginity which is the state of marriage.

但在我们研究这段时期时，17世纪30年代初他写《Comus》的时期，弥尔顿似乎还对永远保持童贞非常感兴趣，甚至避开支持婚姻所必须经历的一个阶段,失去童贞。

耶鲁公开课 - 弥尔顿课程节选