But regional carriers have had four in the last five years, while major airlines have had one.

VOA: special.2009.06.13

But vaccines, and particularly in the last hundred years, vaccines have been one of the most important elements in our progress.

但是疫苗,尤其是在近一百年来,疫苗已经成为,感染性疾病防治进程中最重要的一环

耶鲁公开课 - 生物医学工程探索课程节选

So yet once more -- and I promise this will be one of the last times that we look back at Milton's mask - but yet once more, let's look at Comus.

因此我们要再一次--我保证,这将是我们最后一次回顾弥尔顿所写的这出面具戏,不管怎么着，让我们再次回顾《科玛斯》

耶鲁公开课 - 弥尔顿课程节选

But rates in the United States have increased by more than one-third in the last twenty-five years.

VOA: special.2009.10.26

We're about to start talking about the elements of the language, but to do that, we also need to separate out one last piece of distinction.

我们将会开始讨论,语言的元素，但是为了达到这个目标，我们还需要去做,最后的一个区分。

麻省理工公开课 - 计算机科学及编程导论课程节选

This wall may work as well and last as long but it is not as pleasing to look at as the one built by hand.

VOA: special.2009.06.01

But we have one last step which is obviously merge the sorted halves.

现在还需要最后一步,很明显就是合并有序的两半。

哈佛公开课 - 计算机科学课程节选

This is the claim--not that nobody believes they're going to die; that's the one we've been talking about for the last lecture or so--but instead, the claim that everybody dies alone.

这论点是这样的，不同于我们以前所讲的;,没有人相信自己会死亡，而是说每个人都是孤独而死的。

耶鲁公开课 - 死亡课程节选

All right, so one thing that I want to point out, which I said many, many times on Friday, and this is perhaps the last time I'll say it, but one last time is we can think about why we only see a line for the 2 p orbital, versus we don't see separate lines for a 2 p x, a 2 p y, and a 2 p z.

好的，我还要指出一个问题，这个问题我在上周五已经说了很多很多次了，这可能是我最后一次提到它，但是这最后一次让我们来考虑一下,为什么我们只看到了一条，对应于，2，p，轨道的线,而不是分别对应于，2，p，x，2，p，y，2，p，z，的线？

麻省理工公开课 - 化学原理课程节选

So I keep saying I've got one thing hanging, it's the last thing I want to do, but I wanted you see how much of a difference this makes.

但是我想让大家先，明白这有多大的不同,首先让我们仔细的来看看。

麻省理工公开课 - 计算机科学及编程导论课程节选