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Many of the creatures are exquisitely beautiful, but some seem straight out of science fiction, while others can kill in an instant.
很多生物有着惊为天人的美丽，有的就像直接从科幻小说中走出，有的则是无影杀手。
And just when you think you know the reef, it changes every second, every hour, every day, and every year.
当你以为了解珊瑚礁时，它变了。每一秒，每小时，每天，每年。
It's a world of continual surprises.
这是一个惊喜连连的世界。
This is the amazing story of an everchanging natural miracle, the Great Barrier Reef.
这是一个关于千变万化的自然的神奇故事，这就是大堡礁。
The Great Barrier Reef is so large that it can be seen from space, quite an achievement considering the size of the creatures that built it.
大堡礁大到可以从太空俯瞰到，想想这些建造出她的小生物们，真是了不起的成就。
A vast system that is the Great Barrier Reef is created by animals that are tiny.
这巨大的大堡礁竟由小小的生物建造。
Although they might look like plants, actually they are animals called polyps.
尽管它们看上去就像植物，实际上它们是一种叫珊瑚虫的生物。
Each polyp is like a tiny upside-down jelly fish sitting in a stony cup.
每个珊瑚虫就像一个翻转过来的水母被塞进一个石头洞里一样。
They live together in colonies, like underwater tower blocks.
它们聚集生长，像住在水下高塔小区。
