light speed

同根派生

The spaceship flies at light speed.
宇宙飞船以光速飞行。
The group velocity is estimated as 1/35 of the light speed in vacuum.
群速度估计为真空光速的1/35。
But if I used light speed as a conversion, I would say that Philadelphia is a millisecond away.
但如果我使用光速作为参照，我会说费城在一毫秒之外。
One twitch of the finger is all it takes to dispatch missives to the next continent or the next cubicle at light speed.
手指一动，不管是相邻的大洲，还是相邻的办公隔间，大批的邮件都能以光速送达。
That signal is a propagating electric field like light, and would run at light speed through a perfect conductor.
传播的电场就像光一样，如果是在理想的导体中它将以光速传播。