1. Angular perturbations tend to increase instead of decrease. 角扰动倾向于增加而不是减少。
2. The particle moved inward must speed up in its orbit to conserve angular momentum, and the particle perturbed outward must slow down for the same reason. 为保持角动量不变，向内运动的粒子必得在其轨道上加速，因扰动而向外移的粒子也得因同样的理由减速。
3. The angular acceleration of a rotary shaft is one of the most important parameters for revolution mechanism, which is widely employed in practical applications. 转轴角加速度是旋转机构转动时的一项重要参数，旋转体的角加速度在实践中有着广泛和重要的应用。
英英解释
adj.
1. measured by an angle or by the rate of change of an angle
2. having angles or an angular shape
