Lakes and ponds are basins of water surrounded by land， whereas rivers and streams are the arteries that move freshwater from land， such as mountain peaks， to the oceans. At the edge of many lakes and rivers are saturated wetlands―the swamps， bogs， and marshes―that support myriad types of plant and animal life， prevent floods， retain sediments， and purify drinking water. All the freshwater ecosystems can be found within a watershed―a set of habitats that drain into a single body of water such as a big lakeorthe ocean.
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Besides the air, the farms would also recycle and purify gray water, which is wastewater from sinks, bathtubs and drinking fountains.
除了空气，昆虫型农场还能回收和净化来自水池、浴缸和饮水机的生活污水。
These might include technologies to purify drinking water, diagnose disease, store and convert energy, and improve food processing and storage.
这其中有净化饮用水、疾病诊断、能量转化与贮存以及食品加工与贮藏等技术。
You might have to pump and purify your drinking water.
你可能要和你净化饮用水泵。
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