- Since the last Ice Age they've become cut off from the outside world.
自从上一个冰川期以来 它们便已和外界隔绝 - Yet their impact on life on the surface has been huge.
然而它们对地面上的生物 却有着极其深远的影响 - 500 years ago they supported one of the world's great civilisations
500年前 它们维系着 一个世界上最伟大的文明 - the Maya.
玛雅 - Mexico's Yucatan Peninsula has no rivers, lakes or streams
墨西哥的尤卡坦半岛 没有河流、湖泊和小溪 - so the Maya relied on the cenotes - the flooded entrances to the water-filled caves.
因此玛雅文化完全依赖于沼穴 ——地下水洞的入口 - These flooded shafts are the region's only source of open fresh water.
这些水潭是整个地区 唯一的露天淡水资源
the Maya. 玛雅
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