However, there are light arm troops made up of those too poor to be in the phalanx, who do use projectiles and the projectiles are arrows, javelins, or stones thrown by slings.

然而的确有轻装部队,由没法进入方阵的穷人组成,他们使用投掷武器,包括弓箭,投枪,或者绳索绑着的石头

耶鲁公开课 - 古希腊历史简介课程节选

So, if language seems exhausted because it's always preceding you, everything has always already been said, there's no new plot to be had, the world is full of stock phrases, how do you use them to embody an experience that seems fresh to you?

所以，如果因语言，在你之前就存在，而它就显得枯竭，如果一切都已经被说过，如果已没有新的情节可供创造，如果世界一直充满陈腔旧调，你如何能够用它们,呈现出一个崭新的体验？

耶鲁公开课 - 1945年后的美国小说课程节选

And the president, on many occasions, took unpopular positions that he thought were the right policy because that's what he thought he was elected to do was to use his best judgement and that judgement didn't necessarily need to be the most popular thing around.

许多场合下总统，都会采取并不受推崇的做法,但他认为是正确的政策,因为他认为这是他当选总统该做的,就是运用他最好的判断力,这种判断未必是,最受欢迎的。

普林斯顿公开课 - 国际座谈会课程节选

You could use PCR to do that because if you amplify a gene in PCR, that gene had to be present from the beginning.

你可以用PCR技术来鉴定,因为如果你能用PCR扩增某一段基因,说明它从一开始就肯定是存在的

耶鲁公开课 - 生物医学工程探索课程节选

So what we need to do here is use the Rydberg formula, and actually you'll be given the Rydberg formulas in both forms, both or absorption and emission on the exams.

我们需要用到Rydberg公式，事实上，在考试时,我们会给你们Rydberg公式的两种形式。

麻省理工公开课 - 化学原理课程节选