any of various types of animal which live in water and have a hard outer shell
发音
例句
1. The valuable seafood lobster is crustacean section. 名贵海珍品龙虾属甲壳科。 2. The illustrious Cuvier did not perceive that a barnacle was a crustacean. 大名鼎鼎的居维叶也未看出藤壶是一种甲壳动物。