柯林斯词典double fault (double faults) 1. N-COUNT In tennis, if a player serves a double fault, they make a mistake with both serves and lose the point. (网球)双发失误 返回 double fault剑桥词典(in tennis and some other games ) two mistakes made one after the other by a player who is beginning a game by hitting the ball （指网球等运动中连续两次发球失误的）双误 返回 double fault