| 单词 | 螃蟹 |
| 释义 | 〔really〕The horseshoe crab isn't really a crab at all.其实根本就不是螃蟹〔decapod〕A crustacean of the order Decapoda, such as a crab, lobster, or shrimp, characteristically having ten legs, each joined to a segment of the thorax.十足目动物：十足目的甲壳纲动物，如螃蟹，龙虾，或虾米，其特征是有十足，每一足都与身体中间一节的部分相接 |
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