英语听力:自然百科 大堡礁:自然奇迹—7(在线收听

 Some are little more than rocks, others substantial mountains, covered in woodland. The first British person to see that was captain Cook, who stood here in 1770, and for the first time, realized the scale of the Great Barrier Reef. He also realized that the scale of the problem that faced him. For Cook and his men without benefits of modern charts and sonar, it represented nothing more than a deadly labyrinth. 

 
But it's exactly this complexity and the sheer size of the reef that has created so many opportunities for life. There are fish of almost every imaginable kind. Coral eaters, plant eaters, plankton eaters, the hunters and the hunted. Bluefin trevally, powerful predators that hunt in packs. One minute that apparently minding their own business, the next, charging their prey with a sudden rush. Working together, they create confusion. The trevally depart as quickly as they arrived, and the colorful reef fish regroup again to feed.
  原文地址:http://www.tingroom.com/lesson/zrbaike/2014/283136.html