单词	sems
释义	sems noun ˈsemz plural sems : a fastener assembly consisting of a screw with a washer put on before the threading is cut Word History Etymology probably from sem (short for assembly) + -s
随便看	pogonia pogonias pogonip pogonips pogono- pogonology Pogonomyrmex Pogonomys Pogonophora pogonophorae pogonophoran pogonophorans pogonophoras pogonotomy pogonotrophy pogos pogostema pogostemons pogrom pogromed pogroming pogromist pogromists pogroms pogy

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