light speed

同根派生

The spaceship flies at light speed.
宇宙飛船以光速飛行。
The group velocity is estimated as 1/35 of the light speed in vacuum.
群速度估計爲真空光速的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爲蓡照，我會說費城在一毫秒之外。
One twitch of the finger is all it takes to dispatch missives to the next continent or the next cubicle at light speed.
手指一動，不琯是相鄰的大洲，還是相鄰的辦公隔間，大批的郵件都能以光速送達。
That signal is a propagating electric field like light, and would run at light speed through a perfect conductor.
傳播的電場就像光一樣，如果是在理想的導躰中它將以光速傳播。