Even if the water in which the fish are reared starts out fresh, the build-up of faeces and uneaten food soon makes it foul.
即使是养鱼的水也开始变得不新鲜，粪便和吃剩下的食物堆积，很快使水变得污秽。
2
The chain has fallen foul of some plants in the water.
锚链与水中的一些植物缠在一起了。
3
Montreal-based C-crest Laboratories Inc. conducted the research after a company employee complained of a foul taste and illness after drinking some bottled water.