光速

光速 [guāng sù]

1. ■ speed of light; velocity of light （光磁）; light velocity; ray velocity:

光速约为每秒300000公里。 The velocity of light is about 300000 kilometres per second.

---

常用词组

1. ■ 光速半径 velocity of light radius;

2. ■ 光速不变原理 permanent principle of light velocity;

3. ■ 光速圆柱面 velocity-of-light cylinder;

4. ■ 光速（粒）子 luxon