单词	mean difference
释义	mean difference noun : the average of the absolute values of the n (n −1)/2 differences that exist between pairs in a statistical distribution of n elements Word History First Known Use 1830, in the meaning defined above
随便看	twinnings twins twinset twinsets twinship twinships twinspur twinter twinters twiny twire twires twirl twirled twirler twirlers twirlier twirliest twirligig twirling twirlinglier twirlingliest twirls twirly twirp

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