水生物学研究水体的生物学 The biological study of bodies of water.
海洋覆盖地球表面积多于百分之七十的整个咸水体 The entire body of salt water that covers more than70 percent of the earth's surface.
可涉水而过的地方河等水体的浅处，人们可以在此步行或骑动物或用交通工具淌过 A shallow place in a body of water, such as a river, where one can cross by walking or riding on an animal or in a vehicle.
水体如海、湖、河或溪等大片的水 A body of water such as a sea, lake, river, or stream.
