abysm

例句：

1. 1. The mountain range is home to many abysmal caves.
   山脉中有许多令人畏惧的洞穴。
2. 2. The river flows through a deep abyss.
   河流穿过一个深深的峡谷。
3. 3. The explorer descended into an abyss of darkness.
   探险者陷入了一片黑暗的深渊。