“D region”的概念、定义、翻译、参考文献-科学参考

单词	D region
释义	D region Encyclopedia 理学D层释 D regionD层电离层的底部，电离度较低（包括多种原子离子团）的大气所构成的一层，位于60～90千米的区域。
随便看	space of ideals space of images space of immersions space of infinite connectivity space of infinite dimension space of left cosets space of linear operators space of line elements space of loops space of mappings space of matrices space of measurable functions space of measures space of negative curvature space of operator algebras space of operators space of parameters space of paths space of polynomials space of positive curvature space of quaternions space of real numbers space of right cosets space of sequences space of smooth functions

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