| 单词 | 头足类 |
| 释义 | 〔tetrabranchiate〕Of, relating to, or being a cephalopod of the order Tetrabranchiata, characterized by two pairs of gills and including the chambered nautilus and many fossil species.四腮亚纲的：有关四腮目头足类的，以两对腮为特征，并包括有腔鹦鹉螺和许多化石的种类〔siphuncle〕A tubelike structure in the body of a shelled cephalopod, such as a nautilus, extending through each chamber of the shell.体管：通过外壳中每一腔的有壳头足类（如鹦鹉螺）体内的管形结构 |
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