Astronomy. The proportion of the material of a star, cluster, or galaxy that is an element other than hydrogen or helium, expressed as the ratio of…
| 单词 | θ365 |
| 释义 | the world > the universe > heavenly body > [noun] > metallicity of (1) metallicity1969 Astronomy. The proportion of the material of a star, cluster, or galaxy that is an element other than hydrogen or helium, expressed as the ratio of… |
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