have

1801 篇文章
but they could never have known that these flooded passageways were actually the beginning of subterranean rivers,
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but they could never have known that these flooded passageways were actually the beginning of subterranean rivers, 但他们从不知道这些水下通道 其实是地下河的入口

subterranean passageways actually flooded rivers could these known beginning they of that never have the but were
Yet some have managed it,
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Yet some have managed it, 但有些动物却能在此生存

managed yet some it have
So far, more than 350 miles of underwater galleries in the Yucatan have been mapped,
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So far, more than 350 miles of underwater galleries in the Yucatan have been mapped, 人们迄今为止已绘制了350英里的 尤卡坦半岛地下水系图

mapped galleries yucatan underwater than miles more been far of in have the so
roots of giant tropical trees have pushed their way through cracks in the limestone
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roots of giant tropical trees have pushed their way through cracks in the limestone 大型热带树木的根系 却已穿透石灰岩裂缝

cracks roots limestone way through tropical giant pushed trees their of in have the
These flooded caves in Mexico have remained virtually unchanged for thousands of years.
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These flooded caves in Mexico have remained virtually unchanged for thousands of years. 墨西哥的这些水洞 几千年来几乎保持不变

unchanged remained caves mexico flooded thousands virtually these for of in have years
For 500 years people have been harvesting the nests of cave swiftlets.
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For 500 years people have been harvesting the nests of cave swiftlets. 500年来 人们一直采集洞金丝燕的燕窝

harvesting nests swiftlets cave been for of have the people years
Originally, this whole area would have been one solid block of limestone,
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Originally, this whole area would have been one solid block of limestone, 起初 这整个地方都是 一整块坚固的石灰岩床

block solid originally limestone would area whole been of have this one
these glow worms have solved the biggest challenge that permanent cave dwellers face -
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these glow worms have solved the biggest challenge that permanent cave dwellers face - 这些萤火虫成功地解决了 终生穴居动物面临的最大难题

dwellers solved worms glow cave permanent challenge biggest face these that have the
they have a sinister purpose.
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they have a sinister purpose. 它们却是阴险的陷阱

sinister purpose they have a
but in New Zealand some have turned this darkness to their advantage.
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but in New Zealand some have turned this darkness to their advantage. 但是在新西兰 有些动物却能利用黑暗的条件

advantage turned zealand some new their darkness in have to this but