“density-wave theory”的概念、定义、翻译、参考文献-科学参考

单词	density-wave theory
释义	density-wave theory [`den·sǝd·ē ´wāv ´thē·ǝ·rē] ^ASTROPHYSICS A theory explaining the spiral structure of galaxies by a periodic variation in space in the density of matter which rotates with a fixed angular velocity while the angular velocity of the matter itself varies with distance from the galaxy's center.
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