资料来源 : pyDict

翻身,反侧

资料来源 : WordNet®

roll over
     v 1: make a rolling motion or turn; "The dog rolled over"
     2: negociate to repay a loan at a later date for an additional
        fee; "roll over a loan"
     3: reinvest into a similar fund or security; "She rolled over
        her IRA"