泽地

They could not move their heavy mortars over the swampy ground.

他们无法把重型迫击炮移过那片。

In the swamp the army was beset by mosquitoes.

在, 该军受到蚊子的困扰。

In the swamp we were beset by mosquitoes.

在里, 我们受到蚊子的围攻。

The fort flanked on a swamp.

堡垒侧面靠。

The swamp teems with mosquitoes.

片蚊子多极了。

It settles the nonce dangersome problem of crossing through the marshland by foot, and is simple in structure and convenient in use.

它解决了目前过徒步穿越非常危险的问题，且结构简单，使用非常方便。