| 单词 | gravitational wave |
| 释义 | Word Frequency gravitational wavenoun a wave-like motion in a gravitational field, produced when a mass is accelerated or otherwise disturbed; they travel through space-time at the speed of light and the strongest sources are those with the strongest gravitational fields, although the waves are very weak; predicted by Einstein in 1916 but not first observed directly until 2015 |
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