earth ' s outer core 地球外核
earth s outer core 地球外核
earth ' s outer core
地球的外核
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The inner core, made of very pure, solid iron, rotates along with the outer core, dragging the Earth's magnetic field with them.
BBC: Earth's wobbles reveal deep secrets
The research could help test simulations of how the outer, fluid core generates the Earth's magnetic field, which shields our planet and the teeming life on it from harmful cosmic rays.
BBC: NEWS | Science/Nature | Earth's core runs ahead of crust
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