单词	air cushion
释义	air cushion noun 1 : an airtight inflatable cushion 2 : a mechanical device using confined air for arresting motion without shock Word History First Known Use 1807, in the meaning defined at sense 1
随便看	regreens regreet regreeted regreeting regreets regress regressed regresses regressing regression regression analysis regression coefficient regression curve regression equation regression line regressions regressive regressive sorites regressively regressiveness regressivenesses regressivities regressivity regressor regressors

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