词汇 | once in a blue moon |
释义 | once in a blue moon idiom 少有地 not very often My sister lives in Alaska, so I only see her once in a blue moon. 我姐姐住在阿拉斯加,所以我很少去看她。 Once in a blue moon, there's an issue I can't resolve. 偶尔会有我无法解决的问题。 |
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