2. Europa is fascinating, mostly silicate rock with an ice crust. 欧罗巴是迷人的,主要是硅酸盐岩石和冰壳。
3. But far, far beneath the crust whose rock is so hot, that it is soft. 但是在地壳最最深处的地方,岩石是相当的热的,所以也相当的柔软。
英英解释
n.
1. the outer layer of the Earth
2. a hard outer layer that covers something
3. the trait of being rude and impertinent; inclined to take liberties v.
1. form a crust or form into a crust