施予枪的力将导致枪的动量改变-这就是后座力。
This force on the gun will cause a change in momentum for the gun - that's recoil.
一个重物有很大的动量，也就是说，比如一位高速移动的足球运动员一旦运动起来，就很难改变运动状态。
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.
他们的主要理由很简单：现在的市场动量掌握在买家这边，而且没什么理由让人们预计这一点会改变。
Their main rationale is simple: momentum is on the side of buyers, and there's little reason to expect that to change.
我并不是说，那些单个的粒子没有，持续改变动量。
I'm not saying that the individual particles do not continuously experience momentum changes.
每一辆车的动量,都会改变。
而那些单个星星，会不停地改变动量，因为单个粒子，在单个星星中的，当然会受到，内力。
So the individual stars will change their momentum all the time, because the individual particles in the individual stars will experience, of course, the internal forces.
火箭从发动机获得冲力，那改变了火箭的动量。
A rocket experience an impulse from the engine, and that changes the momentum of the rocket.
单个粒子的动量,会发生改变，但是总动量不变,而动能被损耗。
The momentum of the individual particles gets changed, but the net momentum did not change but the kinetic energy was destroyed.
,如果外力，作用于系统的外力为，意味着动量没改变。
that if the external force, 0 the total external force on the whole system is zero, it means that the momentum cannot change.
墙壁的质量无限大，但是网球的动量,改变了。
The wall has an infinitely large mass, but the momentum of this tennis ball 2mv has changed by an amount 2 mv.
每一个的动量,分别单独改变，但不是系统的动量，作为一个整体，等于m1+m2乘初速度。
The momentum of each one individually is changing, but not the momentum of the system as a whole, and so this equals v prime.
这意味着，如果那有一个力矩，就会有角动量的改变。
That means if there's torque, there's a change of angular momentum.
质量重心的速度，并没有发生改变，你在参照系中可以看出，因为质量重心的速度，总是保持不变，要记住，由于动量守恒。
The velocity of the center of mass has not changed as seen from your frame of reference, because the velocity of center of mass is always the same, remember, because momentum is conserved.
所以力是使得旋转的角动量,改变的理由。
So the torque is persuading the spin angular momentum to change.
我改变了旋转角动量，的方向。
所以力也会改变方向,这个角动量，角动量会保持追着力,并开始自由地转动。
So the torque will also change direction and so this angular momentum, spin angular momentum will keep chasing the torque and start to rotate freely.
冲量，动量的改变；火箭方程；随机运动的压力作用点。
Impulse and momentum change; rocket equation; origin of pressure from random motion.
角动量的改变就是,力乘以δ
碰撞时质点系动量的改变等于作用在质点系上所有外碰撞冲量的矢量和。
The change in the momentum of a system of particles during an impact is equal to the vector sum of all the external impulses acting on the system.
通过这些改变已经减少了对于物料的需求，消除了不必要的动作，降低了人员受伤比率和相关工人的补偿金，并减少了员工的流动量。
Making these changes has reduced physical demands, eliminated unnecessary movements, lowered injury rates and the irassociated workers' compensation costs and reduced employee turnover.
与后者相比，他们的体脂减少量明显更大，而且精瘦肌肉量也增加了đ——虽然两组受试人员均没有改变身体活动量。
They had significantly greater reductions in body fat than the low-fat group, and improvements in lean muscle mass — even though neither group changed their levels of physical activity.
变惯量反作用飞轮是一种新型的动量交换装置，不仅可以通过改变飞轮转速输出力矩，还可以通过改变其转动惯量实现大范围的力矩输出。
VIRW is a new momentum exchange device, which can provide attitude control torque not only by adjusting the spin rate, but also by changing the inertia of the wheel.
事实上，近40%的妇女说虽然她们战胜了乳腺癌，但并未在饮食方式或运动量上有多大改变。
In fact, nearly 40% bf them say even after surviving breast cancer, they haven't made significant changes in the way they eat or how much they exercise.
因此过去10年中我坚持改变了饮食习惯，进食量比之前的10年减少了，而体力活动量增加了。
I have managed over the last 10 years to stay weight stable by altering my diet to eat slightly less calories than I was 10 years ago while also increasing my level of activity.
注意：当手动量程被选择的时候，你不能改变一个峰的量程范围。
NOTE: When Manual ranging is selected, you can't change the Range during a peak.
注意：当手动量程被选择的时候，你不能改变一个峰的量程范围。
NOTE: When Manual ranging is selected, you can't change the Range during a peak.
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