Earth mantle

例句：

1. 1. The Earth's mantle is made up of molten rock.
   地球的地幔由熔融岩石组成。
2. 2.The Earth's mantle is responsible for the planet's magnetic field.
   地球的地幔负责维持行星的磁场。
3. 3.The Earth's mantle is a key factor in determining its composition and structure.
   地球的地幔是决定其成分和结构的关键因素。