“地核”的英语可以翻译为：centrosphere ...

“地核”的反义词：地表。...

按一般标准衡量, 地核是由相当致密的物质组成的.Judge by ordinary standards, the core is made of rather dense stuff.地球的中心是地核,地核的周围是地幔.The earth has a core and a mantle around it.一般认为地核至少是外核由镍和铁构成.The earth's core, at least the outer one is...