“猎户四边形”的概念、定义、翻译、参考文献-科学参考

单词	猎户四边形
释义	猎户四边形 Encyclopedia 理学最亮星表释 Trapezium of Orion猎户四边形位于猎户座大星云M42（见梅西叶星表）中央的疏散星团，其中的4颗亮星构成一个不规则四边形，因而得名。又称猎户四边形星团。
随便看	countable cardinality countable chain condition countable compactness countable covering countable degree countable dimension countable-dimensional countable distributivity countable-finite game countable Hilbert space countable infinity countable Lebesgue spectrum countable model countable ordinal number countable potency countable product countable semiadditivity countable set countable simplicial complex countable space countable subadditivity countable subset countable sum axiom countable superadditivity countable support iterated forcing

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