movement和motion的区别

the difference between motion and movement is very fine.

motion is used to describe physical properties, while movement is used to describe the qualities of motion.

motion doesn't always imply a purpose, and movement usually does.

Mainly Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time.

motion与movement 的区别：两者均可表示“运动”，当表示具体的位置移动时，两者均可用。下面两例均摘自《牛津高阶英汉双解词典》第四版：

the restless motion of the sea 大海的不停的翻腾

the movement of his chest as he breathes 他呼吸时胸部的起伏

但 movement 除以上用法外，还可表示抽象意义的“运动”。如：

The white dove is a symbol of the international peace movement. 白鸽是国际和平运动的象征。

The trade union movement works to obtain higher wages and better conditions. 工会运动旨在争取更高的工资和更好的工作条件。