The president has admitted as much. He says sometimes the Nobel Prize is awarded not to honor specific achievement, but to give momentum to a set of causes.

VOA: standard.2009.12.10

And that's really neat to think about, because photons, of course, are massless particles, they have no mass, so it's neat to think about something that has no mass, but that actually does have a momentum.

而且那真的不容易想明白，因为光子，当然是无质量的粒子，它们没有质量，所以这个真的不容易想明白,一些物体没有质量，但是它们事实上确实有动量。

麻省理工公开课 - 化学原理课程节选

And one thing that Einstein put forth is he figured if well, what we're saying is that light is, in fact, a stream of particles, each one of those particles or photons must, therefore, have a momentum.

爱因斯坦提出了一件事情,他指出如果我们所说的光，事实上是一束粒子，那么这些粒子或者光子中的，每一个都有动量。

麻省理工公开课 - 化学原理课程节选

The Pacific Asia Travel Association says the recovery had gathered momentum, with international visitor arrivals in the region increasing three percent in November compared with a year earlier.

VOA: standard.2010.02.04

The traditional answer is that These guys actually did press up against the rows in front of them And that this provided a momentum That gave the front line an advantage in beating the enemy facing them.

传统的回答是,他们实际上是在推挤前面几排友军,为其提供一种动力,使前线在与对面的敌人交战时具有优势

耶鲁公开课 - 古希腊历史简介课程节选

The president has admitted as much, saying that sometimes the Nobel Prize is awarded not to honor a specific achievement, but to give momentum to a set of causes.

VOA: standard.2009.12.10

And this is just a Newtonian expression of momentum, the product of the mass of the electron times its instant velocity.

这只是牛顿学上关于动量的表达，用电子质量,乘以瞬时速度。

麻省理工公开课 - 固态化学导论课程节选

He notes a rich agenda and momentum for further improvement.

VOA: standard.2010.05.07

So, the sooner you can do that, then you have a lot of momentum around it.

所以越快做到这一点，你就能有很多动力。

斯坦福公开课 - Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选

The U.S.envoy said he will return to the region in the near future to try to build on momentum generated by the Israeli gesture toward a resumption of negotiations with the Palestinians.

VOA: standard.2009.11.25

Or, if you're a pediatrician with a really small patient who will not sit still, it's because the laws of quantum mechanics don't allow an object to have a definite position and momentum.

或者你是个儿科医生,而你的小病人却总也坐不住,这是因为量子力学,不允许物体同时具有确定的位置和动量

耶鲁公开课 - 基础物理课程节选

But,she warns this progress is fragile. She says the momentum for health development could come to a grinding halt because of problems stemming from the food and financial crises, the changing climate and the H1N1 influenza pandemic.

VOA: standard.2009.12.29

Because, again, it seems simpler have a model where there's no momentum.

因为没有momentum的话会更简单,我现在第一次运行。

麻省理工公开课 - 计算机科学及编程导论课程节选

"The Israeli peace camp, as well as the Arab peace camp, is losing trust in the United States and in President Obama and what looked like a very positive and promising momentum that was started back in June in Cairo has been already lost,"

VOA: standard.2009.09.07

And we'll also talk about photon momentum as another example of light behaving up as a particle.

并且我们也会讨论光子动量的问题,这个可以作为光有粒子行为的例子。

麻省理工公开课 - 化学原理课程节选

Clinton's comments at a joint press event with the Uruguayan leader were the highest-level expression of U.S.concern thus far about a Venezuelan arms buildup that gained momentum with an announcement this week that the South American state will buy Russian battle tanks and anti-aircraft missiles.

VOA: standard.2009.09.15

And what de Broglie said is well, if it's true that light, which has a wavelength can have momentum, then it must also be true that matter, which has momentum, also has a wavelength.

德布罗意说的是，如果光具有波长和动量是对的,那么物质具有动量和波长,也一定是对的。

麻省理工公开课 - 化学原理课程节选

In an attempt to regain political momentum in the health-care debate, Mr.Obama told a town hall in New Hampshire that Republicans are hoping to kill the reform effort this year like they did in 1993 and 1994 under former President Bill Clinton.

VOA: standard.2009.08.12

And to just give you a sense of what this is, the analytical expression that Heisenberg gave in one of its forms is that the uncertainty in the momentum a particle times the uncertainty in its position, this is the uncertainty.

给你说明一下什么是，分析的表述方式,海森堡给出的按照它的其中一种形式,那就是,粒子动量的不确定度乘以,位置的不确定度，这是不确定关系。

麻省理工公开课 - 固态化学导论课程节选

"That helps the sport grow. If we just stayed all our separate little ways, the sport would never get momentum, so it's basically a national movement where we have one governing body kind of governing all the rules so we all play by the same rules."

VOA: standard.2010.08.03

It's a particle of mass m and momentum p has this energy so you solve for the energy, you get two answers.

一个质量为m,动量为p的粒子,有这么大的能量,你解出能量,得到两个解

耶鲁公开课 - 基础物理课程节选

U.S.Defense Secretary Robert Gates. "There is a general feeling I could say that with all these additional troops and all these additional efforts that everybody is making to get to the elections in Afghanistan, to have a free and fair election and then see over the next months whether we can begin to shift the momentum,".

VOA: standard.2009.06.11

So since it's a component of the angular momentum, that means that it's never going to be able to go higher than l is, so it makes sense that, for example, it could start at and then l go all the way up to l.

因为，它是，角动量的分量，这意味着，它不会，比l大，这是很容易理解的，比如说，它可以从零开始,一直到。

麻省理工公开课 - 化学原理课程节选