Surrounding the core is the outer core.

围拢内核是外面核心.

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As things cool down, the liquid outer core freezes into the solid inner core.

随着很多物质冷却下来, 液态的外核冻结在固体内核上.

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Evidence indicates that outer core is about twice as dense as the material in the mantle.

有证据表明,组成外核的物质的密度是组成地幔的物质的两倍.

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The Earth's core consists of a fluid outer core and a solid inner core.

地核由液态的外核和固态的内核组成.

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