1. Brave investigators volunteered to drink swamp water, but nothing happened to them.
    勇敢的调查者自愿喝沼泽里的水，但是什么也没发生。

2. We were beset by mosquitoes in the swamp.
    我们在沼泽地里受到了蚊群围攻。

3. Ditches were dug to drain water from the swamp.
    挖渠排掉沼泽的水。

4. It was hard to walk through the swamp.
    要走过沼泽地是困难的。