once-in-a-blue-moon

英 [once-in-a-blue-moon]
美 [once-in-a-blue-moon]

中文释义

na. 〈非正式〉难得；罕见；千载难逢

单词分析

单词结构：

once-in-a-blue-moon

字母数：19

记忆提示

🎯 重点记忆：

  • 单词拼写：once-in-a-blue-moon
  • 核心含义：na. 〈非正式〉难得；罕见；千载难逢
  • 相关含义：罕见、千载难逢

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更新时间：2026-04-13 18:51:35