单词	保留率
释义	保留率retention rate
随便看	be on someones's side of the fence be on speaking terms be on tenters be on the air be on the auction block be on the ball be on the bench be on the binge be on the booze be on the bright side of ... be on the bum be on the cards be on the cops be on the defensive be on the dole be on the door (be) on the drink be on the drink be on the edge of a precipice be on the fence be on the firing line be on the go be on the grab be on the hedge be on the high ropes