:关于水的英文诗歌四首欣赏

　　The drainage area of a river system is called its watershed,

　　While erosion and deposition change the land in ways seen and unsaid.

　　Ponds and lakes form within the depressions in the land,

　　Where sunlight hits, there will be many plants instead of sand.

　　Convection forces circulate the water in the lakes,

　　While refreshing the water of nutrients(6) in its seasonal wake.

　　Convection forces are caused by density differences between hot and cold.

　　The heat in your home works on this same principal we’ve been told.

　　As the sun heats the surface of a pond or lake,

　　Temperature difference in the water makes it circulate.