| 单词 | nebula |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔Coalsack〕A dark nebula, one of the nearest to Earth, that appears in the southern Milky Way.煤袋：最接近地球的黑色星云之一，见于银河系南部美国传统〔Coalsack〕A similar dark nebula in the Northern Hemisphere near the constellation Cygnus.黑色星云：北半球接近天鹅座的一种类似黑色星云美国传统〔Ring Nebula〕A planetary nebula in the constellation Lyra.环状星云：天琴星座中的漂移星云美国传统〔emission nebula〕A nebula that absorbs ultraviolet radiation from stars and reemits it as visible light.发射星云：吸收星体的紫外线辐射并且转变成可见光放射出来的星云美国传统〔inversely〕The size of the nebula at this stage is inversely proportional to its mass.这个阶段星云的大小与其质量成反比。柯林斯高阶〔nebulosity〕A nebula.星云美国传统〔nebulosity〕A mass of material constituting a nebula.星云状物体美国传统〔nebulous〕Of, relating to, or characteristic of a nebula.星云的：关于或类似星云的美国传统〔nucleus〕The central or brightest part of a nebula or galaxy.核：星云或银河的中心或最亮部分美国传统〔occult〕He arranged to launch his rocket just before the moon occulted the nebula.他把火箭发射安排在了月亮掩住星云之前。外研社新世纪〔planetary nebula〕A nebula, such as the Ring Nebula, consisting of a hot, blue-white, central star surrounded by an envelope of expanding gas.行星状星云：由一颗炽热的、蓝白色的中心恒星和包围它的一层向外膨胀的气体组成的星云，如环状星云美国传统〔wilderness〕In remote wildernesses of space groups of nebulae are found.在遥远寂寥的天际,可看到一团团星云。英汉大词典Nebulae contain very large amounts of ionized gas.星云里含有大量的电离气体。剑桥国际These were the primeval nebulae from which planets formed.这些是原始星云，行星即由此形成。剑桥国际 |
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