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- 湖泊学研究淡水，尤指湖泊和海洋的生命和现象的科学研究
The scientific study of the life and phenomena of fresh water, especially lakes and ponds.
- 过去这些年来，用蒸馏法制取淡水成本一直很高。
In the past, obtaining fresh water by distillation has always been too expensive.
- 这个淡水湖里有许多种鱼。
There are many fish in this freshwater lake.
- 盐水比淡水浮力大。
Salt water is more buoyant than fresh water.
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