"淡水"用英语表达为 "freshwater".
"freshwater" 是由两个单词 "fresh" 和 "water" 组合而成的。 "fresh" 意为"新鲜的"， "water" 意为 "水"。因此 "freshwater" 意为 "新鲜的水"。
例句:
The river is a source of freshwater for the surrounding communities.
(这条河是周围社区的淡水源。)
Many species of fish can only survive in freshwater environments.
(许多种鱼类只能在淡水环境中生存。)
The drought caused the freshwater lake to dry up.
(干旱使得淡水湖干涸)