Missiles that are simple kinetic penetrators ram through earth by dint of their extreme impact momentum.

单纯动力钻地飞弹纯粹利用强大的冲击动量冲入地下.

The specific kind of composite targets can only have good defence effect for the long rod penetrators with certain velocity.

特定组成成分的陶瓷复合装甲只对一定速度范围内的侵彻体有较好的防御效果。