A southern white rhinoceros is shown at the Fossil Rim Wildlife Center in Glen Rose, Texas, in this July 2003 photo. The animals have been hunted to the brink of extinction worldwide for their horns and visitors to the center can get an up-close-and personal look at these animals. (AP Photo/Rick Sammon)

　　词汇：

　　rhinoceros n.[动]犀牛

　　fossil n.化石

　　brink n.(峭岸、崖的)边缘

　　extinction n.消失,消灭

　　horn n.(牛、羊等的)角