As the two armies approach each other, I should make it clear, they start out walking at a certain clip.

当两支军队互相接近,我该说得详细一些,他们疾驰前进

耶鲁公开课 - 古希腊历史简介课程节选

In approach number one, you simply lay out the various positions, pro and con, and the professor strives to remain neutral; sort of not tip his hand about what he holds.

方法一，你们简单的列出不同的观点，正面和反面，老师争取保持中立;,不表明他支持哪边。

耶鲁公开课 - 死亡课程节选

It's a secret number so that if Julius Caesar scrambled his message with the key 13, well, then the recipient had better know what that number is or realistically, -- and this is why it's kind of hard to buy -- into some of these age old algorithms, -- what would an alternative approach be to figuring out Julius Caesar's messages to his generals if he didn't know that secret number was 13?

它是一个机密的数字，以至于,如果凯撒大帝使用密钥13加密了它的消息，然后接收者最好知道那个数字是什么,实际上--这就是为什么很难,破解这些古老的算法-,有什么变换方法使凯撒大帝的将军,可以解密凯撒大帝的消息，如果他不知道,那个机密数字是13呢？

哈佛公开课 - 计算机科学课程节选