outer fissure

例句：

1. 1.The outer layer of the skin is where most of the damage occurs.
   皮肤的最外层是损伤发生的地方。
2. 2. The rock was so old that it had several outer fissures.
   这块石头太旧了，有好几个裂缝。
3. 3. The car's exterior was scratched and dented from the collision.
   汽车的外壳因为碰撞而刮擦和凹陷。