旋转的陀螺正在失去动量。
一旦你开始让巨石滚动，巨石就会产生动量，这是由其质量和速度决定的。
Once you have started the boulder rolling, it develops momentum, which is defined by its mass and velocity.
在物理学中，运动的物体有两个特征与理解能量系统动力学相关：惯性和动量。
In physics, moving objects have two characteristics relevant to understanding the dynamics of energy systems: inertia and momentum.
圆盘产生自己的引力拖曳，这种相互作用的力夺走了行 星在其轨道上的动量，迫使它盘旋向恒星的方向。
The disk exerts its own gravitational tug, and this interplay of forces robs the planet of momentum in its orbital path, forcing it to spiral in toward the star.
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.
物体下落增进动量。
也有其他类型的动量。
例如，无论一个舞者多么想要跳离地板，然后开始旋转，角动量守恒定律绝对阻止这样的动作。
For example, no matter how much a dancer wishes to leap off the floor and then start turning, the law of conservation of angular momentum absolutely prevents such a movement.
动量被认为是“守恒的”，也就是说，动量一旦被建立，就一定会转移到其他地方。
Momentum is said to be "conserved", that is, once you build it up, it has to go somewhere.
毕竟，我们不只是说物体或人有动量；我们说的是整个系统都有动量。
After all, we don't speak only of objects or people as having momentum; we speak of entire systems having momentum.
一种相互作用且复杂的现象是波浪形成时发生的风向水的动量传递。
An interacting—and complicating—phenomenon is wind-to-water transfer of momentum that occurs when waves are formed.
专家说，体重增加是因为运动量减少。
运动量少、与同伴聚会少、阅读印刷媒体（即报纸）少都与幸福感较低有关，但令人惊奇的是，做作业的时间少也与幸福感较低相关。
Less sport, and fewer meetings with peers correlated with lower wellbeing, as did less time reading print media (newspapers) and, surprisingly, less time doing homework.
所有这一切都意味着活动量和噪音水平增加，这对有听觉功能缺陷的儿童来说有更加严重的潜在影响。
This all amounts to heightened activity and noise levels, which have the potential to be particularly serious for children experiencing auditory function deficit.
她通过去健身房，和自行车小组一起骑车，徒步旅行，上班时不坐电梯而是走楼梯来增加了自己的活动量。
She increased her activities by going to the gym, riding with a biking group, hiking and taking the stairs instead of the lift at work.
伦德斯女士说，世界卫生组织的研究报告称，90%的澳大利亚和新西兰年轻人没有达到健康生活所需的最低每日活动量。
Ms. Lenders said World Health Organization research reported 90 percent of young Australians and New Zealanders were not getting the minimum daily levels of activity they needed in order to lead a healthy life.
发现正则动量与空间相的梯度成正比。
It is found that the canonical momentum is directly proportional to the gradient of space phase.
气流的最大穿透深度随气体动量的增加而增加，而氧气喷枪的直径保持恒定。
The maximum penetration depth of gas flow is increased with the increase of gas momentum while the diameter of oxigen gunjet keeps constant.
不要混淆动量和能量。
这个的动量是多少？
没有动量。
下一个，动量守恒。
这是之前的动量。
角动量直接指向我，远离你们的方向。
角动量现在是在这个方向。
这个方向旋转，角动量是，这个方向。
Spinning this direction, angular momentum is in this direction.
角动量是这个方向了。
它描述的是，电子的叫角动量。
我就是旋转的角动量。
有了旋转的角动量。
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