a large reptile with a long tail, four short legs, a long pointed mouth, and sharp teeth that lives in parts of the US and China. Alligators are amphibious (=they can live both in water and on land), and they are closely related to crocodiles. 短吻鳄(水陆两栖爬行动物,尾长,四肢短,嘴长而尖,齿锋利,生活在美国和中国)