“the core and mantle system”的概念、定义、翻译、参考文献-科学参考

单词	the core and mantle system
释义	the core and mantle system Encyclopedia 理学[地理系统]释 the core and mantle system地核和地幔系统地球内部圈层的重要组成部分，其中一个重要组成部分是地核和地幔系统。过去的25亿年里，地核物质一直在向地幔的底部转移。核幔边界层连接了下地幔和外核两大系统，是地核和地幔生物物质较为活跃的化学反应区。
随便看	principal partition principal part of an infinitesimal principal plane principal plane of crystal principal plane of photograph principal plane pattern principal planet principal point principal point of photograph principal polarization principal polynomial principal projection property principal punishment principal quantum number principal quintic form principal radius of curvature principal ray principal reduced form principal refractive index principal remainder principal representative principal right ideal principal right ideal ring principal ring principal role performance, additional role performance and double role performance of one character

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