“planetary nebula”的概念、定义、翻译、参考文献-科学参考

单词	planetary nebula
释义	planetary nebula Encyclopedia 理学行星状星云释 planetary nebula行星状星云其中心有一向白矮星过渡的热星，且由稀薄电离气体组成有明晰边缘的小圆面状星云。星云为该中心星所抛出，正向外膨胀，并由中心星的紫外辐射照射而发光。 Physics 交叉学科天体物理学 planetary nebula行星状星云 Astronomy planetary nebula缩写：PN。行星状星云
随便看	soil spectroscopy soil spraying gun soil stability control soil stable organic matter soil sticky masses soil strength soil structure soil structure assessment soil structure classification soil structure coefficient soil structure degradation soil suction force soil suitability soil sulfur soil surface complex soil surfaced area soil survey soil swelling Soil Taxonomy soil taxonomy soil temperature soil temperature at tiller node soil temperature gradient soil temperature observation of rice paddy soil temperature regimes

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