More than eight hundred children were ages two to four the first time they were tested.

VOA: special.2009.10.21

So in addition to having these two carbon bonds, we actually also have four carbon hydrogen bonds in addition to our carbon-carbon bonds.

在这碳碳之间的键以外，我们还有四个碳氢键,除了我们的碳碳键外。

麻省理工公开课 - 化学原理课程节选

Here we go. One, two, three, four, one, two, three, four, nice and loud. Come on. I want to hear it.

来,一二三四,一二三四,大点声,让我能听见

耶鲁公开课 - 聆听音乐课程节选

The American College of Rheumatology says fibromyalgia may affect two to four percent of the population.

VOA: special.2011.07.26

2 3 4 Now, at this point in the story, one, two, three, four, so notice what seems to be happening here.

到这一步，注意将会发生什么。

哈佛公开课 - 计算机科学课程节选

Cows need about two to four weeks to learn to use the robotic milking systems.

VOA: special.2009.05.12

That makes sense because we know that every single electron has to have its own distinct set of four quantum numbers, the only way that we can do that is to have a maximum of two spins in any single orbital or two electrons per orbital.

那个讲得通,因为我们知道每一个电子,都有它自己独特的量子数,我们能做的唯一方式是,在任一单个轨道中最多有两个自旋电子,或者每个轨道有两个电子。

麻省理工公开课 - 化学原理课程节选

Planting beans every two to four weeks until early August will provide a continuous harvest.

VOA: special.2009.03.24

So what this means, if you used to have two children and now you have four, how do you provide for the extra two?

比如一家过去有两个孩子,现在多了两个,多了两张嘴,怎么办呢

耶鲁公开课 - 古希腊历史简介课程节选

It found that almost four percent of deaths around the world in two thousand four were linked to drinking alcohol.

VOA: special.2009.09.08

Try feeling upset at your powerlessness to change the fact that two plus two equals four.

尝试为你无力,改变二加二等于四的事实而痛苦。

耶鲁公开课 - 死亡课程节选

The thirty-four room house opened to the public in February of two thousand eight after fifteen million dollars in work.

VOA: special.2010.05.10

It allows four bonds to form instead of just two.

我们把四个氢原子。

麻省理工公开课 - 固态化学导论课程节选

Now,airlines will have to check the no-fly list within two hours of being told of additions, instead of twenty-four hours.

VOA: special.2010.05.08

But,the turbo-prof will be somebody who is assigned to Reims, and who takes the train there every day, or to Tours; but to Lyon also since this is only two hours, this is four-hundred kilometers.

不过涡轮教授被派到兰斯教书,他每天都要坐火车往返,抑或是去图尔斯,从这里去里昂要用两小时,这有四百公里

耶鲁公开课 - 1871年后的法国课程节选

Since two thousand five, the F.C.C.has used four policy principles to guide its enforcement in cases related to the Internet.

VOA: special.2009.09.25

I've assigned a full two weeks to the Republic, which would be four lectures, but because I wanted to do some other things with the course as well, I had to cut the Republic by one lecture, and now I'm paying for that today.

我会分配两周的时间来消化《理想国》,等同四堂讲课，但因为我想要,加一些内容到课堂来，所以我必需砍掉《理想国》的一堂课，今天我要付出代价。

耶鲁公开课 - 政治哲学导论课程节选

For example,a two thousand four study showed that the number of school nurses nationally failed to meet federal guidelines.

VOA: special.2009.08.06

You drive your car in, it shows you by the arrows where you go, you stop at window one to make your order and pay, and then you go to window two to collect your food, and they're open twenty-four hours.

你开车进来,沿着箭头指示,直到第一个窗口停下,点单,付账,再开到第二个窗口领取食物,他们是二十四小时营业的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

He says the advice there is to have at least two thousand four hundred dollars for twelve months in the United States.

VOA: special.2009.05.21

Down here, I've just got two things to merge, and then I've got things of size two to merge and then things of size four to merge. But notice a trade off. I have n operations if you like down there of size one.

但是n的大小是不同的，是吗？在这里我们只要合并两个元素,然后是合并长度为2的列表,接下来是合并长度为4的列表,但是观察一下之间的权衡关系。

麻省理工公开课 - 计算机科学及编程导论课程节选

The study found that worldwide, more than two and a half million people age ten to twenty-four died in two thousand four.

VOA: special.2009.09.28

And when I go to the A-1 Toyota for my service or to buy my new Camry, which I've done every four years for the last two decades, I don't always think of a slave market but it does occur to me that--.

当我去丰田A1店,接受服务或购买我的新佳美的时候,过去二十年中我每四年都会去一次,我不是总会联想到奴隶市场,但我确实曾经那么想过

耶鲁公开课 - 美国内战与重建课程节选

The records show that he was forced to kill at least four men and possibly two others.

VOA: special.2010.03.17

We were talking about the subdivision of that pulse, the organizing of that pulse into meters, and that we had this capacity to indicate what the meter was by these numbers: two-four, and three-four for duple and triple meter.

我们还讲到律动的进一步划分,将律动组织成拍子,与此同时我们能够用一些数字,来表示不同的拍子,比如,用二四拍和三四拍表示二拍子和三拍子

耶鲁公开课 - 聆听音乐课程节选

Tornadoes usually travel in a northeasterly direction with a speed of thirty-two to sixty-four kilometers an hour.

VOA: special.2010.05.11

As you may know, there's yet another organization where we could group this in units of four but for all intents and purposes-- there are a few nuances to it-- four is simply a multiplication of two.

也许你知道的,还有另外一种组织方式,我们可以四拍一组,但是不论出于什么动机或者目的,这其中的区别甚微,四拍就是两拍的简单相乘

耶鲁公开课 - 聆听音乐课程节选

He says the Leiopathes corals were shown to be about four thousand two hundred sixty-five years old.

VOA: special.2009.05.12

If I look at something that goes as n squared, if this is the edge of the nucleus here and if this is r1, 4 it says when n goes to two the radius goes to four.

如果在原子核外侧,我们发现某一半径和n的平方成正比，也就是说当n为2时半径等于。

麻省理工公开课 - 固态化学导论课程节选

Rock really comes forth not so much in twos but in fours we'll call this a 4/4, and you caso we'll call this a 4/4 and you can beat a four pattern to it or you can beat a two pattern.

摇滚乐都是四拍子,不是二拍子,是四拍子,我们称为四四拍,你可以作为四拍子,也可以作为两拍子来打节拍

耶鲁公开课 - 聆听音乐课程节选