单词	master-at-arms
释义	master-at-arms noun mas·​ter-at-arms ˈma-stər-at-ˈärmz  plural masters-at-arms : a petty officer charged with maintaining discipline aboard ship Word History First Known Use 1732, in the meaning defined above
随便看	ostracize ostracized ostracizer ostracizes ostracizing ostraco- ostracod Ostracoda ostracodae ostracodan ostracodas ostracode ostracoderm Ostracodermi ostracodermies ostracodermis ostracoderms ostracodes ostracodous ostracods Ostracoidea ostracon ostracophore Ostracophori ostracophorous

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