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Some atolls are round, their rings unbroken...
有些珊瑚环岛是圆的，它们的环形没有打破
while others have been bent out of shape by ocean currents and earthquakes.
其余的已经被洋流和地震弄得弯曲走样了。
And a few span huge distances,
有几个跨径距离巨大
a testament to volcanoes whose size and power were once truly colossal.
实际证明了火山曾经的规模和力量实在巨大
Rangiroa in French Polynesia.
法属玻利尼西亚的朗伊罗阿
Over 30 miles wide, its lagoon is so large that if you were floating in its centre,
超过30英里宽，如果你漂浮在巨大的礁湖中心，
you wouldn't see land in any direction.
你看不到任何方向有陆地
The story of land building in the South Pacific
南太平洋中岛屿产生的故事
may start with volcanic eruptions... but it doesn't end there.
始于火山爆发，但并不会这里结束。
A volcano once formed an island here, but it sank back below the surface.
这里曾经有一座形成岛屿的火山，但它沉回水下了。
Now it's on the rise again. This is the extraordinary Kingman Reef.
如今它又再次上升。这是奇特的金曼礁。
Over 3,000 miles from the nearest continent, it is one of the last pristine coral reefs left in the world.
离最近的大陆超过3000英里，这是世上留下最后的原始状态的珊瑚礁之一。
