crust-mantle boundary

例句：

1. 1. The crust-mantle boundary is a critical region for studying the Earth's internal structure.
   地壳-地幔边界是研究地球内部结构的关键区域。
2. 2.The crust-mantle boundary plays a crucial role in the movement of tectonic plates.
   地壳-地幔边界在构造板块的运动中起着关键作用。
3. 3.Recent studies have revealed that the crust-mantle boundary may be responsible for some of the largest earthquakes in the world.
   最近的研究表明，地壳-地幔边界可能是世界上一些最大地震的原因。