英语词汇i come once in a blue moon怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	i come once in a blue moon
释义	once in a blue moon — 千载难逢 ()
随便看	is heavily involved is heavily towards is heavily used is heavily weighted is heavily weighted is he aware i shed a tear is hedged i shed light on how i shed new light is he going to is he having is he having is heightened during is heir to the throne is held is held annually is held by a court or tribunal of competent jurisdiction is held by a court or tribunal of competent jurisdiction is held by a lawyer is held by a lawyer is held by more is held by more is held constant is held harmless

英汉双解词典包含2273206条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。

once in a blue moon —