(informal)put all one's efforts into doing something to no avail
累死累活白干一場，忙得臉色發(fā)紫
she could talk to him until she was blue in the face, but he was just not hearing.
她可以和他談到累死，可他只當沒聽見。
(informal)very rarely
(非正式)難得有一次，極為罕見
(N. Amer. informal)speak continuously and at great length
(北美，非正式)喋喋不休，沒完沒了地說，說個不停
To the point or at the point of extreme exasperation
臉色發(fā)青：至于或處于極度憤怒的狀態(tài)
I argued with them until I was blue in the face.
和他們爭論到我臉色發(fā)青
At a far distance; into the unknown.
遠距離；遙不可測
From an unexpected or unforeseen source
出乎意料的：來自沒有想到或沒有預測的
criticism that came out of the blue.
突如其來的批評
At a completely unexpected time
突然的，始料不及的：在意料不到的時間里
arrived out of the blue.
突然拜訪