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Mantle
地幔
We are living on the surface of the Earth.
我们生活在地球表面。
So, what is inside the Earth?
那么，地球内部是什么？
There is a mantle under the surface of the Earth.
地球表面以下是地幔。
The mantle takes up 84% of the Earth.
地幔占地球体积的84%
It is a rocky layer, and it covers the core of the Earth.
它是岩层，包裹着地核。
The mantle near the surface is like a bunch of hard rocks.
靠近地表的地幔就像一堆坚硬的岩石。
But the mantle near the core is boiling liquid rocks.
而靠近地核的地幔是炽热的岩浆。
When a volcano erupts, this boiling mantle comes out.
火山喷发时，炽热的地幔随之而出。
Also, the mantle heats up undergroud water.
而且，地幔会加热地下水。
Thanks to the mantle, we can enjoy a hot spa.
多亏有了它，我们才可以享受温泉。
