Investigators found a trench containing human remains.调查人员发现一条沟中有人的尸体。
It was in winter that they dug trenches and laid the oil pipes.他们是在冬天挖沟铺设油管的。
He looped the hand grenade into the enemy trench.他将手榴弹呈圆弧形地抛进敌人的战壕。
They rushed the enemy's trenches.他们突破了敌人的战壕。