"my trench coat was lost"
When you come to this trench, swim through it, not over it.
"The World war 1 trench was the biggest I have found" or "The trench in the ocean was the biggest in the world"
"Trench warfare was used in World War I"
The ocean trench is almost 7 miles deep.
The soldiers dug a trench to provide cover from enemy fire during the battle.
it took a whole army of men to build a trench around the city.
As my submarine descended into the ocean trench, we passed by a slab of rock.
A trench box, trench shield, trench sheets, are the put into trenches to stop the walls collapsing inwards and injuring or killing the workmen/utility workers, etc, working in the trench.
The Mariana Trench is the deepest in the world.
The Marianna Trench is great example of subduction.
bellow the deep trench there was a fish
The artillery subjected the enemy trench-line with cannonade .