For example, certain amphibians retain fishlike gills even when fully mature and past their water-inhabiting period.
如某些两栖动物即使在完全成熟并已经度过水中生活的时期后仍然保留有鳃。
For example, certain amphibians retain fishlike gills even when fully mature and past their water-inhabiting period.
如某些两栖动物即使在完全成熟并已经度过水中生活的时期后仍然保留有鳃。
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