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,它们其实是众多独立的礁石, 大约有2900个独立的礁石系,组成了大堡礁...
The motorboat cut across swift currents and skirted dangerous reefs.汽艇穿过激流,绕过险滩.Fish are abundant about the reefs.暗礁附近鱼很多.The pilot guided us through the dangerous reefs.这位引航员引导我们通过了危险的暗礁区....