There are five lakes: Superior, Michigan, Huron, Erie and Ontario.共有五个大湖泊: 苏必利尔湖, 密歇根湖, 休伦湖, 伊利湖和安大略湖.Autochthonous or allochthonous, may be important in the total metabolic system of lakes and streams.自源的或他源的在湖泊与河流的总代谢系...
The beaches are wide and filled with interesting flotsam and jetsam .海滩宽阔，到处是有趣的被冲上岸的零碎杂物。Sick and starving refugees are the flotsam and jetsam of war.生病和饥饿的难民是遭战祸而流离失所的苦命人.He was another of the city's flotsam.他是这个城...