| 单词 | 占优 |
| 释义 | 〔crustacean〕Any of various predominantly aquatic arthropods of the class Crustacea, including lobsters, crabs, shrimps, and barnacles, characteristically having a segmented body, a chitinous exoskeleton, and paired, jointed limbs.甲壳纲动物：任一种甲壳纲的数量占优的水生节肢动物，包括有螯虾、蟹、虾和藤壶等，其特征是具有节状身体、几丁质的外骨骼以及成对的、有关节的脚 |
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