资料来源 : pyDict

温习,改良,熟练

资料来源 : WordNet®

brush up
     v 1: refresh one's memory; "I reviewed the material before the
          test" [syn: {review}, {refresh}]
     2: bring to a highly developed, finished, or refined state;
        "polish your social manners" [syn: {polish}, {round}, {round
        off}, {polish up}]