字典網>> 英漢字典>> O開頭詞條>>once in a blue moon的意思 漢英字典once in a blue moon中文翻譯：千載難逢地once in a blue moon字典網 相關詞條：once a week once and away once once upon a time Once bitten twice shy once for all once and for all once more once-through fuel cycle once too often