Practice makes perfect. 孰能生巧

　bet one`s bottom dollar 确信无疑

　　sell like hot cakes 很畅销

　　Look before you leap. 三思而后行

　　Haste makes waste. 欲速则不达

　　Easy come, easy go. 来得快，去得快

　　drive sb. to the wall 使某人发疯/受不了;使某人束手无策