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Baikal is the oldest lake in the world
貝加爾湖是世界上最古老的湖泊
and despite the harsh conditions, life flourishes here in isolation.
盡管生存條件惡劣，生命仍在這個與世隔絕的地方得到了興盛
80% of its species are found nowhere else on Earth, including the world's only freshwater seal.
湖里80%的物種在地球上其它地方都不存在，包括世界上唯一的淡水海豹
With this seal and its marine-like forests of sponges,
有了這種海豹再加上海底森林一般的海綿
Baikal seems more like an ocean than a lake.
貝加爾湖看起來更像是海洋，而不是湖泊
There are shrimp-like crustaceans, giant amphipods as large as mice.
這種長得像蝦一樣的甲殼動物是一種大型端足類動物，它有老鼠那么大
They are the key scavengers in this lake.
它們是湖里不可或缺的“清潔工”
The water here is just too cold for the bacteria that normally decompose the dead.
由于湖水過于寒冷，分解尸體的細菌很難在此存活
Most rivers do not end in lakes but continue their journey to the sea.
大部分河流并非止于湖泊，而是一直奔向大海。
