“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。
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