基本解釋[魚] 臀鰭詞組短語短語anal fin rays 臀鰭Anal fin ray 臀鰭條vent to anal fin length 排泄孔臀鰭長anal fin更多詞組英英字典柯林斯英英字典 a median ventral unpaired fin, situated between the anus and the tail fin in fishes, that helps to maintain stable equilibrium anal fin劍橋字典anal fin柯林斯字典專業(yè)釋義辳業(yè)科學(xué)臀鰭生物學(xué)臀鰭