大海捞针 英语怎么说?"a red-letter day" ,"once in a blue moon","have g

翻译俗语：gave me a black look a blue moon a red-letter day all t Once In A Blue Moon 歌词 This is a chance once in a blue moon, Once in a blue moon 这句话话是啥意思啊 once in a blue moon 为什么 解释为 机会难得,绝无仅有? "I haven't seen her once in a blue moon. once in a blue moon 出处是哪里? 求魂音泉的once in a blue moon的罗马音 once in a blue moon 意思和once in a while一样嘛? there is once in blue moon i havetogotowork,it's a blue Mond 请问 once in blue moon You only get a glance like this once in a blue moon!