“Orion nebula”的概念、定义、翻译、参考文献-科学参考

单词	Orion nebula
释义	Orion nebula Encyclopedia 理学发射星云释 Orion nebula猎户座大星云位于猎户座的发射星云。用肉眼观察，猎户座中构成“宝剑”的有三颗星，中间一颗是较模糊的亮斑，它不是单颗星，而是一个星云，即猎户座大星云（星表编号为M42和NGC1976）。
随便看	speaking and singing art skills of Quyi speaking rate Speak Mandarin Campaign SPE Annual Conference Spear Bearer Spearman Spearman Brown formula Spearman-Brown formula Spearman correlation coefficient Spearman rank correlation Spearman rho-metric Spearman's correlation coefficient Spearman's rank correlation coefficient Spear of the Nation Spear with Bronze Handle and Iron Blade of Guo State SPEC SPEC benchmark Specht Specht property special special Abelian function special abelian variety Special Act for Normalization and Limitation of Advanced Placement in Public Education special action special air return lane in mining area

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