“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	Fe-Al金属间化合物 fear fear behavior of livestock fear conditioning Feargus Edward O’Connor fear impairing kidney fear leading to qi sinking Fearless Weapon fear of cold fear-potentiated startle reflex feasibility feasibility analysis feasibility research feasibility study feasibility study for concentrator projects feasibility study of biomass power generation feasibility study of deposit mining Feasibility Study of Environmental Engineering feasibility study report feasible feasible basis feasible constraint feasible decision feasible descent direction feasible direction

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