英语听力:自然百科 大堡礁:自然奇迹—24(在线收听

 Their snake-like bodies can even wriggle into crevices.

And they can fold their dorsal fin flat to squeeze through small holes.
 
 
If discovered, a sleeping parrotfish wouldn't stand a chance.
Once the first shock has caught its prey, the smell and commotion attracts others.
 
 
Every now and then,  you find yourself in moderately  strange situations in life, and this is one of them.
I'm in a cave with  feeding sharks.
They are very well designed to be in here and I'm not sure I am, quite frankly.
  原文地址:http://www.tingroom.com/lesson/zrbaike/2014/283156.html