Caspian Sea: The World’s Largest Inland Water Body and Its Shifting Shorelines
里海：世界最大内陆水体及其不断变化的岸线
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The Caspian Sea is not a true sea but a landlocked, saline lake bordered by five countries.
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Its surface level fluctuates naturally over decades due to changes in Volga River inflow and evaporation rates.
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