地球内核由外核富含铁元素的液态物质结晶而成。

The Earth's solid inner core was formed by the freezing of iron rich liquid materials making up the outer core.

youdao

地球内核由外核富含铁元素的液态物质结晶而成。

The Earth's solid inner core was formed by the freezing of iron rich liquid materials making up the outer core.

youdao