- During its journey from the surface
在地面上流淌时 - the water absorbed carbon dioxide from the soil
水从土壤中吸收了二氧化碳 - making it mildly acidic.
成为弱酸性 - And over millions of years this acid eats away the limestone
石灰岩经过几百万年的酸蚀作用 - creating a maze of caverns and passages
形成了迷宫般的溶洞和通道 - that sometimes go on for miles.
有的甚至深达数英里 - This is the biggest underground river passage in the world,
这是世界上最大的地下河通道
And over millions of years this acid eats away the limestone 石灰岩经过几百万年的酸蚀作用
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