That's called conservation of angular momentum.

这被称作“角动量守恒定律”。

Angular Momentum - Torques - Conservation of Angular Momentum - Spinning Neutron Stars - Stellar Collapse.

角动量 - 力矩 - 角动量守恒-纺陲双子星 -?星坍塌.

Light beams can carry both spin and orbital angular momentum (OAM) associated, respectively, with circular polarisation and the helicity of their phasefronts.

光能携带自旋角动量和轨道角动量（OAM），它们各自与圆偏振和相前的螺旋性有关。

In chapter 4, methods for producing beams with orbital angular momentum are introduced.

第四章介绍了产生拥有轨道角动量的光束的方法。

Angular Momentum : a quantity associated with how an object moves around a reference point.

角动量： 与一个物体绕参考点运动有关的度量。

In chapter 3, the orbital angular momentum of complex astigmatic elliptical beams is investigated.

第三章研究了复杂像散椭圆光束的轨道角动量。

In addition, method of the measurement of the orbital angular momentum is demonstrated.

另外也介绍了到目前为止测量光束轨道角动量的方法。

In motions of rotation angular momentum appears in abundance the alike way as linear momentum appears in motion of translation.

在旋转运动中的角动量产生的办法与平移运动中的线动量的产生是基本功相似的。

And except for what's lost to friction, that angular momentum has to stay constant while the dancer is on pointe.

除了摩擦损耗的动量之外，当舞者踮起脚尖时，角动量必须保持不变。

In recent years, there have been many researches focusing on orbital angular momentum of light beam in the field of optics.

近年来，在光学领域内，关于光束轨道角动量的研究，受到广泛的关注。