crust

/krəst/

the outer layer of the Earth

中文释义：地壳

The Earth's crust is composed of several tectonic plates that move slowly.

地壳由几个缓慢移动的构造板块组成。

Volcanic eruptions occur when magma from the mantle rises through the crust.

当地幔中的岩浆穿过地壳上升时，就会发生火山喷发。