Alligator lives in the rivers and lakes in the hot wet parts of America and China. 短吻鳄产于美洲和中国的江湖及湿热地带。
In the pale light of the tunnel, 30-foot fossil traces of lycopsid gleam slickly in the shale roof like alligator skins. 它们看起来像一棵棵巨型的芦笋。在隧道内黯淡的灯光下,页岩顶部30英尺长的石松化石遗迹就像鳄鱼皮般发出柔滑的光亮。
An alligator is a crocodilian in the genus Alligator of the family Alligatoridae. The two living species are the American alligator (A. mississippiensis) and the Chinese alligator (A. sinensis). In addition, several extinct species of alligator are known from fossil remains. Alligators first appeared during the Paleocene epoch about 37 million years ago.