trench

他穿着风衣走着。

He is dressed in a ___trench coat as he walks.

士兵们在战壕里躲避敌人的炮火。

The soldiers hid in the ___trench to avoid enemy fire.

科学家们发现了海床上一条新的深海沟。

Scientists discovered a new deep ___trench on the ocean floor.