“永久阴影区”的概念、定义、翻译、参考文献-科学参考

单词	永久阴影区
释义	永久阴影区 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	Strahan Strahler-Zhou Shuzhen's climatic classification straight straight angle straight bevel gear straight chain reaction straight circular cone straight drawing straightedge straight edge diffraction straightenable dynamical system straightener straightening straightening law straightening of the angle straightening theorem straightest path straight eyepiece straight fan straight fertilizer straight filament straightforward straightforward calculation straight helicoid straight knife cutting machine

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。