n. 甲壳,壳
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- Fairy shrimp:any of various transparent freshwater crustaceans of the order anostraca that lack a carapace and characteristically swim upside-down.
"仙虾:透明的淡水鳃足类的任何一种,无甲壳并且倒置游动."收藏 - Any of various minute,chiefly freshwater crustaceans of the subclass Ostracoda,having a bivalve carapace.
介形亚纲动物属介形亚纲的任一种体小的、主要生活于淡水中的甲壳纲动物,长有一对硬壳收藏
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