单词	anal fin
释义	anal fin noun in fishes : a median unpaired fin on the lower posterior part of the body behind the vent and sometimes confluent with the caudal fin see fish illustration Word History First Known Use 1769, in the meaning defined above
随便看	metazoal metazoan metazoans metazoas metazoea metazoon metazoons Metcalfe bean Metchnikoff mete mete (out) mete out meted meted (out) meted out metempiric metempirical metempirically metempiricism metempiricist metempiricists metempirics metempsychic metempsychose metempsychoses

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