marsh

He led them away from a marsh.

他把他们带离沼泽。

My urine and excrement are recycled by a system of ducts, pipes, wires, plants, and marsh-microbes, and redeemed into water and food which I can eat.

由众多的导管、管线、植物和沼泽微生物构成的系统回收了我的尿液和粪便，并将其还原成水和食物供我食用。