Major Robert Anderson, the commander of the small United States force at Sumter, wrote that his food supplies were low.

VOA: special.2009.08.06

The reason is because the predominant force at this point is going to be the attraction that's being felt between the nuclei and the electrons in each of the atoms.

这是因为这时候最主要的力,是吸引力，它来自于,其中一个原子的电子与另外一个原子的原子核之间。

麻省理工公开课 - 化学原理课程节选

So, what we're looking at here is the force when we have two charged particles, one positive one negative -- here, the nucleus and an electron.

我们现在研究的是,一正一负俩个带电粒子之间的,作用力-在这里。

麻省理工公开课 - 化学原理课程节选

A Union force at Appomattox Station blocked any further movement to the west.

VOA: special.2009.12.24

You can ask what the force that this quark will exert on that quark at a certain separation.

你会问,这个夸克对一段距离以外的那个夸克,有多大的作用力

耶鲁公开课 - 基础物理课程节选

All of them were ordered to move against the Union force at Gettysburg.

VOA: special.2009.11.05

Part of the poem's force derives from the status of this moment as something remembered, and remembered within the context of a nation at war.

诗歌的一部分力量来源于,事情被记起那一刻的状态，并且是在国家处于战争时期的情况下记起的。

耶鲁公开课 - 现代诗歌课程节选

Day by day, the Union force at Fort Monroe grew larger.

VOA: special.2009.09.17

How do you deal with that trade-off where you absolutely need an ad sales force but at the same time, if one person at a time, you just can't say let's go out and hire five good engineers or five good ad sales people and not have them be great?

如何做出选择，如何取舍,当你急需一批销售人员，但如果只碰见一个合适的人选，你不只能因此去找,5个差不多的工程师,或者5个差不多的广告销售？

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

The United States force at Harpers Ferry was small.

VOA: special.2009.08.20

And fairly soon into the conversation I demonstrated some principle that you've probably learned in your physics class having to do with an object at rest remaining at rest unless acted upon by a force.

很快，在交谈中,我就展示了一些原理,可能你们在物理课上学过,要使静止的物体保持静止,必须有外力作用。

耶鲁公开课 - 心理学导论课程节选

The chief minister's body was found by the Indian Air Force at the site where his helicopter crashed Wednesday.

VOA: standard.2009.09.03

But you can also look at it qualitatively, so, if you think about the force between the electron and the proton, you could just qualitatively think about what's happening.

但你也可以定性的来研究这个问题，所以如果你们考虑电子,和质子之间的作用力,你可以定性的来想。

麻省理工公开课 - 化学原理课程节选

"Let's go from here," he said "Let's scrap the bill. Let's build health care reform that respects the limited government and liberty of the American people, so help us God!" Grassroots conservatives, many of them members of the so-called Tea Party movement, are out in force at the rally, eager to spread their anti-Obama, anti-tax,anti-big government message.

VOA: standard.2010.03.18

The fact that you don't need a force for it to move forever at a given speed in a given direction, that's not obvious, because in daily life you don't see that.

对于物体不需要力的作用就能保持,确定的速度和方向持续运动这一事实,它并非显而易见,因为在日常生活中你看不到这种情况

耶鲁公开课 - 基础物理课程节选

And one that is moving continues to move at an unchanging speed, so long as no outside force influences it.

VOA: special.2011.06.01

A typical problem that you may have done in your first pass at Newton's law, someone tells you a force of 36 Newtons is acting on a mass of whatever, 4 kilograms; what's the acceleration?

在你们第一次接触牛顿定律时,可能见过这么一道典型题目,告诉你,一个 36 牛的力,作用在一个物体上,4 千克吧,问加速度是多少

耶鲁公开课 - 基础物理课程节选

This force,led by General Zachary Taylor, had camped near the town of Corpus Christi at the mouth of the Nueces River.

VOA: special.2009.02.19

The great discovery that Galileo and Newton made is that you don't need a force for a body to move at constant velocity.

伽利略和牛顿的伟大发现就是,物体不需要力来维持匀速运动

耶鲁公开课 - 基础物理课程节选

Confederate leaders ordered the attack after President Abraham Lincoln refused to withdraw the small force of American soldiers at Sumter.

VOA: special.2009.08.13

If you look at the electrical force, the force of electricity, proton and electron or something, it's not proportional to the mass of either object.

如果你考察电作用力,即电现象产生的力,质子啊,电子啊,或者其它什么东西,这种力不和物体的质量成比例

耶鲁公开课 - 基础物理课程节选

There was a new system of liquid nitrogen to keep the pilot cool and to resist the crushing force of gravity at high speeds.

VOA: special.2010.07.07

What makes the law surprising is that if I only gave you half the law, namely every body will remain at rest if it's not acted upon by a force, you will say, "That's fine. I accept that, because here's something, you leave it there, it doesn't move.

这条定律妙就妙在,如果只看定律的前半段,即,如果物体不受外力作用,将保持静止状态,你肯定会觉得,"这没什么,我能理解,因为你把一个物体放在那里,自己肯定不会动

耶鲁公开课 - 基础物理课程节选

It settles into a long, powerless slide toward the landing field at Edwards Air Force Base.

VOA: special.2010.07.07

Then I know that kx is equal to the force that is exerting at this separation.

然后我就能知道 kx 等于,这个位置上讲台产生的力的大小

耶鲁公开课 - 基础物理课程节选

Poor health would later force him to leave London and settled at Down House near Kent,England.

VOA: special.2009.02.25

This was the force that would try again to capture the Confederate capital at Richmond,Virginia.

VOA: special.2009.10.15

Nine days after take-off, Voyager landed smoothly at Edwards Air Force Base in California.

VOA: special.2010.10.06

And the Air Force currently uses radar developed by DeTect at several bases.

VOA: special.2009.04.01

The commander of a United States navy force in the Pacific, Thomas Jones, received news that led him to believe the United States was at war with Mexico.

VOA: special.2009.02.19