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

In fact,last year was his one hundred fiftieth birthday, Celebrations took place not only in the United States, but also at two universities in Beijing and in Croatia, Italy and Poland.

VOA: special.2010.01.07

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