英语词汇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	once in a blue moon
释义	once in a blue moon 千载难逢；非常稀罕，极少，难得有一次极为罕见
随便看	flight characteristic flight characteristics flight class flight control flight-control surface flight-control system flight conveyor flight crew flight crews flight data file flight data processing system flight data recorder flight data recorders flight deck flight decks flight-dependent training flight design flight distance flight dynamics flight engineer flight engineers flight envelope flight envelopes flight feather flight feathers

英汉双解词典包含483723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。