Some atolls are round, their rings unbroken...
有些珊瑚環島是圓的,它們的環形沒有打破
while others have been bent out of shape by ocean currents and earthquakes.
其余的已經被洋流和地震弄得彎曲走樣了。
And a few span huge distances,
有幾個跨徑距離巨大
a testament to volcanoes whose size and power were once truly colossal.
實際證明了火山曾經的規模和力量實在巨大
Rangiroa in French Polynesia.
法屬玻利尼西亞的朗伊羅阿
Over 30 miles wide, its lagoon is so large that if you were floating in its centre,
超過30英里寬,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陸地
The story of land building in the South Pacific
南太平洋中島嶼產生的故事
may start with volcanic eruptions... but it doesn't end there.
始于火山爆發,但并不會這里結束。
A volcano once formed an island here, but it sank back below the surface.
這里曾經有一座形成島嶼的火山,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。這是奇特的金曼礁。
Over 3,000 miles from the nearest continent, it is one of the last pristine coral reefs left in the world.
離最近的大陸超過3000英里,這是世上留下最后的原始狀態的珊瑚礁之一。