例句與造句

1. Being neither electromagnetic in nature nor relating to gravity as it stands on its own, this wave energy is a spiraling, non-Hertzian electromagnetic wave that travels through the vacuum of space at super-luminal speed-a billion times faster than the speed of light.
2. The ( absolute ) refractive index of a medium " n " ( dimensionless ) is an inherently important property of physical optics defined as the ratio of the luminal speed in vacuum " c " 0 to that in the medium " c ":
3. It's difficult to find luminal speed in a sentence. 用luminal speed造句挺難的