Hippopotamidae

例句：

1. 1. The Hippopotamidae is a group of reptiles that includes crocodiles.
   Hippopotamidae是一类爬行动物，包括鳄鱼。
2. 2. This species is found in rivers and lakes, where it feeds on fish.
   这种物种生活在河流和湖泊中，以鱼类为食。
3. 3. Due to habitat loss, the Hippopotamidae population has decreased significantly.
   由于栖息地丧失，Hippopotamidae的种群数量显著减少。