大堡礁是唯一能够从地球同步轨道上看得见的生命有机体。它是自然界的一大奇观。

The Great Barrier Reef is the only living organic collective visible from Earth's orbit. It's one of the wonders of the natural world.

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我在眺望自然界奇观之一的大峡谷。

I was looking across one of the wonders of the natural world-the Grand Canyon.

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大峡谷是自然界最美丽的奇观吗？

Is the Grand Canyon the greatest wonder anywhere in the natural world?

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