diaphtherine

例句：

1. 1.The diaphtherine layer isthe thinnest part of the Earth's crust.
   地壳的最薄部分是地幔层。
2. 2. The diaphtherine layer is also known as the mantle.
   地幔层也被称为地幔。
3. 3.The diaphtherine layer isresponsible for the movement of tectonicplates.
   地幔层负责板块的运动。