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inner core /ˈɪnə ˈkɔː/ n

中文：内核

中文 · 内核Español · núcleo internoFrançais · noyau interne
Meaning：Composed of iron and nickel, it is subject to so much pressure that it remains in a solid state in spite of temperatures higher than 5,000°C; its diameter is 1,600 km.
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Earth's internal structure

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