资料来源 : WordNet®

unrepeatable
     adj 1: not able or fit to be repeated or quoted; "what he said was
            funny but unquotable" [syn: {unquotable}] [ant: {repeatable},
             {repeatable}]
     2: unique; "dogs and mice and flies are as unrepeatable as men
        are"- Theodosius Dobzhansky