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湖中湖加拿大安大略省的休伦湖中有个面积2600km~2的马尼图林岛,岛上有一个面积106km~2的马尼图林湖、是世界上最大的湖中湖。湖上湖在北美洲阿拉斯加北部的巴罗沃海角有一“双层”的怒沃克湖,湖的上层是淡水,下层是咸水,真可谓湖上有湖。岛中岛南太平洋西部的汤加共和国的西列岛中,有一个岛屿,岛上有个湖,湖中有个岛,一环套一环,构成了世界上罕见的“岛中岛”。
Huzhong Lake Lake Huron, Ontario, Canada has an area of 2,600 km2 and is located in Manitoulin Island. The island has an area of 106 km2 of Manitulin Lake and is the largest lake in the world. The Lake on the Lake There is a “double-storey” Nuwark Lake in the Cape Barovo Sea north of Alaska. The upper part of the lake is fresh water, and the lower part is salt water. It can be said that there is a lake on the lake. The Island of Tonga in the western part of the South Pacific in the South Pacific of the South Pacific island has an island. The island has a lake and an island in the lake. It forms a rare island in the world.