fresh water

n. 淡水

例句与用法：

In the past, obtaining fresh water by distillation has always been too expensive.

过去这些年来，用蒸馏法制取淡水成本一直很高。

The scientific study of the life and phenomena of fresh water, especially lakes and ponds.

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

Fresh water was at a premium after the reservoir was contaminated.

在水库被污染之后,清水便因稀而贵了。

Salt water is more buoyant than fresh water.

盐水比淡水浮力大。