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The Caspian Sea is a inland sea locked and locate between Asia and Europe.There are many countries around it as Russia,Iran,Turkmenistan etc.The middle-asia surround the north&east of it.
里海位於亞洲与欧洲之间，是一個被陸地封鎖了的内陆海。環繞裏海的國家有：俄羅斯 (達吉斯坦、卡尔梅亚, 阿斯特拉罕)、阿塞拜疆、伊朗 (马赞德兰省)、土庫曼斯坦及哈薩克斯坦, 中亚大草原环绕着里海北部和东部。
The Caspian Sea is one of the smallest sea in the world.In the fact it is a sea and lake.And it's the largest inland body of water in the world and have a area of 371.000 sq.km.
里海是世界上最小的海之一。实际上，根据科学家的定义，里海同时具有海和湖的特征。里海是世界上最大的内陆水体。里海面积371,000 平方公里 (143000 平方英里).
The Caspian holds a great amount of sturgeon, which yield eggs that are processed into caviar. Overfishing threatens the sturgeon population, to the point that environmentalists advocate banning sturgeon fishing completely until the population recovers.
里海生产大量的鲟鱼，这些鲟鱼可以加工成鱼子酱。因为过度的捕捞鲟鱼威胁到这种鱼类的数量，所以环保工作者们提倡禁止捕捞鲟鱼直到鲟鱼数量回升。
Potentially huge oil fields also lie underneath the Caspian Sea. The main problem is the status of the Caspian Sea and the establishment of the water boundaries between the five riparian countries. The level of the Caspian has fallen and risen many times over the centuries. Some Russian historians claim that a medieval rising of the Caspian caused the coastal towns of Khazaria, such as Atil, to flood. The Volga River and the Ural River discharge into the Caspian Sea.
在里海的底部存在了巨大的石油能源。主要的问题就是里海的位置和五个绕里海国家的水分界线的划分。在过去的时间里海的水位不断的增长和下降，一些俄罗斯的历史学家提出了一个中世纪的导致里海水位增长的原因。伏尔加河以及乌拉尔河都有流入里海。
一万多年前，里海曾与黑海、地中海相连，海水彼此沟通。后经地壳运动，地形发生了明显的变化，高加索山和厄尔布尔土山的崛起，把里海与海洋分离开了，从而形成今日这个内陆湖。里海是咸水湖，平均盐度为千分之11至13。
里海的卫星图片,图中白线交叉处为阿塞拜疆首都巴库。左上角为伏尔加河入湖处
