Each year, Americans eat an average of more than five kilograms of chocolate per person.

VOA: special.2010.02.17

So the probability of having an electron at the nucleus in terms of probability per volume is very, very high.

在单位体积内发现,一个电子的概率非常非常大。

麻省理工公开课 - 化学原理课程节选

So, if we do this calculation for an electron, saying it moves at 10 to the 5 meters per second, then what we end up with for a wavelength is 7 times 10 to the -9 meters.

如果我们已知电子以，10的5次方每秒的速度运动，那么做一个计算,可以得知它的波长是,7乘以10的负9次方米。

麻省理工公开课 - 化学原理课程节选

She arrived at school in New York City -- only to learn that an unwritten limit of "two Negro students per year" had already been met.

VOA: special.2010.04.24

What the Dutch did--the Netherlands is an extraordinarily small country, and it's the most populated country in Europe, then, per square kilometre, and is now--once.

那些荷兰人...荷兰是一个,非常非常小的国家,也是当时欧洲人口密度最高的国家,如果以每平方公里人口计算,现在也是

耶鲁公开课 - 欧洲文明课程节选

In contrast, those who ate two or more servings of brown rice per week had an 11 percent reduced risk.

VOA: standard.2010.06.25

It's something I throw up has an initial speed of 10 meters per second.

抛出物体的,初速度是10米/秒

耶鲁公开课 - 基础物理课程节选

"There's over 800 members who express an interest every year to come on to this and we take 32 per year."

VOA: standard.2010.02.25

in the context of a web page. And increasingly that is where the human computer interaction is, and so will you be empowered by terms and not to just to make a website per se but to make an application, something that's of interest to you, something that solves problems, something that lets you tell someone through the most electronic means possible that you saw them somewhere on campus.

以网页内容的形式表现出来,人机交互的运用将越来越多，而且你将学会编程,不仅能制作网站，还能做出应用程序，一些你感兴趣的东西，一些解决问题的手段，还有一些可以让你通过使用,现有的电子手段来分辨出,校园里面看到的一个人的东西。

哈佛公开课 - 计算机科学课程节选

The challenge for designers was to create a vehicle with the protection provided by an MRAP but about 25 per cent lighter.

VOA: standard.2009.11.02

If your plan is to accelerate a 3 kg mass with an acceleration of 2 meters per second, you better have a rope that can furnish that force and it can take the tension of 6 Newtons.

如果你想用 2 米每秒平方的加速度,去拉一个 3 千克的物体,那么你就需要一根能提供拉力的绳子,并且它能够承受 6 牛的张力

耶鲁公开课 - 基础物理课程节选

Another group lived in what the researchers call an enriched environment up to 20 mice per cage,with toys, hiding places,and running wheels.

VOA: standard.2010.07.14

You see an object in motion, you find a and you give a a certain numerical value, 10 meters per second squared.

你看到一个物体在运动,你会发现它的 a,然后给 a 赋值,10 米每秒平方

耶鲁公开课 - 基础物理课程节选

Now,with the vision centers in place, doctors are treating an average of 5,000 patients per center per year.

VOA: standard.2010.05.25

I have to change the prototype of this function to say that swap no longer takes an int per se or another int per se, but rather it takes two pointers, two ints, and in fact, it's on the very last page if you're still flipping.

我改变了这个函数的原型,来说明swap不再携带那两个int数本身，而是携带两个指针，两个整型数指针，实际上，它是在最后那页上。

哈佛公开课 - 计算机科学课程节选

"This was the 40 percent decrease in risk. We did not observe an association for drinking three cups or less per day."

VOA: standard.2010.06.30

Illinois Governor Pat Quinn recently signed an agreement with China to export of Asian Carp per year.

VOA: standard.2010.07.19

The government has also submitted legislation that would increase the excise tax on beer by an average of 50 percent per year from 2010 to 2012.

VOA: standard.2009.10.15

Surveys from a well-regarded polling organization in the U.S.also show that nearly half of Palestinians and 60 per cent of Lebanese have an unfavorable view of Iran.

VOA: standard.2010.07.26

"So they very quickly turn into about 13 tons per mile, and when you look at an eighty mile reach, it's phenomenal how much bio mass is taken up by these Asian Carp."

VOA: standard.2010.07.20