地球内部炽热和熔化的物质浮到上面形成了新的地壳。

Hot, melted material from deep inside the Earth moves up to create new crust.

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地球内部深处是十分炽热的岩浆的岩石熔化物。

Deep inside the Earth are very hot molten rocks called lava.

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地球内部深处是十分炽热的岩浆的岩石熔化物。

Deep inside the Earth are very hot molten rocks called lava.

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