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单词 speed of light
释义
Speed Of Light
nnoun.timethe speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second
Synset:c light speed
Hypernyms:constant speed velocity
Inherited Hypernyms:speed of lightconstantnumberdefinite quantitymeasureabstractionentity
Inherited Hypernyms:speed of lightspeedratemagnitude relationrelationabstractionentity
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