资料来源 : pyDict

支援;倒车;证实;淤塞

资料来源 : WordNet®

back up
     v 1: give moral or psychological support, aid, or courage to;
          "She supported him during the illness"; "Her children
          always backed her up" [syn: {support}]
     2: move backwards from a certain position; "The bully had to
        back down" [syn: {back off}, {back down}]
     3: establish as valid or genuine; "Can you back up your
        claims?" [syn: {back}]
     4: make a copy of (a computer file) especially for storage in
        another place as a security cop; "You'd better back up
        these files!"
     5: become or cause to become obstructed; "The leaves clog our
        drains in the Fall"; "The water pipe is backed up" [syn: {clog},
         {choke off}, {clog up}, {congest}, {choke}, {foul}] [ant:
         {unclog}]