light-speed
UK/'laɪt-spiːd/US
释义
n.
The speed at which light travels in a vacuum (about 300,000 km/s)
光速
词根拆分
原生英语light（光）+ speed（速度）= 光的速度。light 取光义。
词根 light 还连着 58 个词常用搭配
- 1.light-speed communication光速通信
- 2.approach light-speed接近光速
例句
- 1.
Nothing with mass can travel at light-speed.
任何有质量的东西都无法以光速行进。
- 2.
The starship jumped to light-speed and vanished.
那艘星舰跃迁到光速，瞬间消失。