1. Any of various freshwater fishes of the family Cyprinidae related to the carps and minnows, especially a Eurasian species, Leuciscus cephalus. 
   白首鲤一种相关于鲤鱼和鲦鱼的鲤科淡水鱼，尤指欧亚品种，圆鳍雅罗鱼
2. Any of various spiny-finned freshwater fishes of the genus Perca, especially either of two edible species, P. flavescens, of North America, and P. fluviatilis, of Europe. 
   河鲈任何一种有刺状鳍的鲈属淡水鱼，尤指两种可食用类，北美洲的金鲈和欧洲的河鲈
3. Freshwater fish; freshwater lakes. 
   淡水鱼；淡水湖
4. Any of several elongated freshwater fishes of the Amazon, western and central Africa, and Australia that have lunglike organs as well as gills and are able to breathe air, allowing certain species to survive periods of drought inside a mucus-lined cocoon in the mud. 
   肺鱼亚马孙河，中部和西部非州，澳大利亚的一种细长的淡水鱼；这类鱼除了鳃之外还有肺状的器官，能够呼吸空气。某些鱼种还可在土地中粘液丝结成的茧状物中经历一段干旱而不死
5. Freshwater: A precious commodity 
   淡水:宝贵的商品

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