“permanent shadow region”的概念、定义、翻译、参考文献-科学参考

单词	permanent shadow region
释义	permanent shadow region Encyclopedia 理学〔月球构造〕释 permanent shadow region永久阴影区在自转轴与其黄道面交角很小的天体的极区存在的常年未受阳光直射的区域。简称PSR。
随便看	second-order optimality condition second-order ordinary differential equation second order perturbation second order phase transition second-order phase transition second-order predicate second-order predicate calculus second-order predicate logic second-order process second-order property second order spatial coherence second-order spatial coherence second order spectrum second-order sufficient condition second-order system second order temporal coherence second-order temporal coherence second order term second-order theory second-order variation second order wave force second organic aerosol compounds second orthogonality relation second Pappus theorem second partial derivative

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