earth nucleus

• 地核

earth nucleus的用法和样例：

例句

1. The earth has a core and a mantle around it.
   地球的中心是地核，地核的周围是地幔。
2. The entire earth may have been melted, and the iron and silicate components separated to form the core and mantle.
   整个地球被熔化，铁和硅酸盐分离而形成地核和地幔。