do something until (或 till) one is blue in the fac 1 . 累死累活白干一场,忙得脸色发紫 once in a blue moon 2 . (非正式)难得有一次,极为罕见 scream (或 yell) blue murdertalk a blue streak 3 . (北美,非正式)喋喋不休,没完没了地说,说个不停 习惯用语 blue in the face 1 . 脸色发青:至于或处于极度愤怒的状态 into the blue 2 . 远距离;遥不可测 out of the blue 3 . 出乎意料的:来自没有想到或没有预测的