momenta

Each of the individual momenta may change in time .

每个单独的动量可能随时间而变化。

Numerical Analysis of a Class of Planar Three-Body Systems with Nonzero Angular Momenta

一类具非零角动量的平面三体系统的数值分析

During the 1980s the green movement gathered momentum .

20世纪80年代绿色运动的势头开始增强。

Demands for his dismissal have gathered momentum in recent weeks

最近几周，要求将他解职的呼声越来越高。

They are each anxious to maintain the momentum of the search for a solution .

他们每个人都迫切希望能一直劲头十足地去寻求解决方案。

This campaign is really gaining momentum

该运动的势头越来越猛。

They picked up momentum , then slipped into neutral and coasted quietly down the slope .

他们加大油门，再切入空挡，随后没大响动地滑下山坡。

The historical tide is surging forward with great momentum .

历史洪流气势磅礴，奔腾向前。

A falling object gains momentum as it falls .

物体下落增进动量。

The spinning top was losing momentum .

旋转的陀螺正在失去动量。

As the dog sprang on me , I made use of its momentum to press it down and hold it there .

狗扑过来，我就势把它摁住不放。

The fight for his release gathers momentum each day .

争取使他获释的斗争声势日益加强。

We 've got to win the game , otherwise we 'll lose our momentum .

这场比赛咱们一定得赢，不能挫了锐气。

As my opponent threw himself at me , I used his momentum to fling him to the ground .

对手扑过来，我就势把他摔倒在地。

Angular momentum can accompany nonrotational motion .

非旋转的运动可能伴随着有角动量。

But there are other kinds of momentum as well .

但也有其他的动量。

One kind of momentum is technological momentum .

一种动力是技术动力。

But the momentum of incandescent lighting does not stop there .

但白炽灯的势头并没有就此止步。

In physics , moving objects have two characteristics relevant to understanding the dynamics of energy systems ： inertia and momentum .

在物理学中,运动物体有两个与理解能量系统动力学相关的特征：惯性和动量。

By far the biggest type of momentum that comes into play when it comes to changing our energy systems is economic momentum .

目前为止,经济是在改变能源系统方面发挥作用的最大动力。

The fame passed down the years , gaining momentum from mere exposure as it did so .

名气随着岁月流逝而流传,从单纯曝光效应中获得动力。

It is a movement building steady momentum : a call to make research data , software code and experimental methods publicly available and transparent .

这是一项产生持续声势的运动:使研究数据、软件代码和实验方法分公开、透明的呼吁。

Another type of momentum we have to think about when planning for changes in our energy systems is labor-pool momentum .

在计划能源系统变革时,我们必须考虑的另一种动力是劳动力储备动力。

After all , we don 't speak only of objects or people as having momentum ; we speak of entire systems having momentum .

毕竟,我们说不仅物体或人有动量,整个系统都有动量。

Once you have started the boulder rolling , it develops momentum , which is defined by its mass and velocity .

一旦巨大的石头开始滚动,它就会产生动量,这是由它的质量和速度决定的。

Momentum is said to be " conserved , " that is , once you build it up , it has to go somewhere .

人们认为动能是守恒的,也就是说,动能一旦产生,就会转化到其他地方。

Whether it 's a sports team or a presidential campaign , everybody relishes having the big momentum , because it makes them harder to stop or change direction .

无论是运动队还是总统竞选,每个人都喜欢拥有巨大的动量,因为这让他们难以停止或改变方向。

So a heavy object , like a football player moving at a high speed , has a lot of momentum — that is , once he is moving , it is hard to change his state of motion .

所以一个重的物体（比如一个高速运动的足球运动员）有很大的动量,这意味着一旦他运动起来,就很难改变他的运动状态。

When you hear people speaking of making a rapid transition toward any type of energy , whether it is a switch from coal to nuclear power , or a switch from gasoline-powered cars to electric cars , or even a switch from an incandescent to a fluorescent light , understanding energy system inertia and momentum can help you decide whether their plans are feasible .

当你听到人们谈论如何快速将一种能源转化为另一种能源的时候,无论是从煤炭到核能,还是从汽油动力汽车到电动汽车,抑或是从白炽灯到荧光灯,了解能源系统的惯性和动量可以帮助你决定他们的计划是否可行。

Unfortunately for them ( and often the taxpayers ) , our energy systems are a bit like an aircraft carrier : they are unbelievably expensive , they are built to last for a very long time , they have a huge amount of inertia ( meaning it takes a lot of energy to set them moving ) , and they have a lot of momentum once they are set in motion .

不幸的是,对他们（通常是纳税人）来说,我们的能源系统有点像航空母舰：价格高得惊人,需要花很长时间建造,巨大的惯性意味着需要大量的能源才能启动,一旦启动,它们就有很大的动量。