It’s only been latterly that we’ve discovered that it’s lots of individual reefs, around about 2,900 separate reef systems which make up the Great Barrier Reef.
直到近来我们才发现，它们其实是众多独
，大约有2900个独系，组成了大堡。
It’s only been latterly that we’ve discovered that it’s lots of individual reefs, around about 2,900 separate reef systems which make up the Great Barrier Reef.
直到近来我们才发现，它们其实是众多独，大约有2900个独系，组成了大堡。
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