Where have you been? I haven't seen you in a blue moon.

你到哪儿去了? 我好久没见到你了.

《简明英汉词典》

You get a chance like this only once in a blue moon.

这种机会你是很难得到的.

辞典例句

Such a chance comes once in a blue moon.

这样的机会极其难得.

辞典例句

He gives us a treat only once in a blue moon.

他招待我们一顿可真是千载难逢.

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Great writers like Mark Twain only appear once in a blue moon.

(像马克吐温那样伟大的作家,是很罕见的. )

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That sort of thing only happens once in a blue moon.

这种事情难得发生一次.

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Eg . Seeing the partial eclipse is once in a blue moon.

看见月偏食真是个千载难逢的事.

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This is a chance once in a blue moon.

这可是个难得的机会.

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It was an opportunity that comes once in a blue moon.

这种机会来一次可太难了.

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He gets drunk only once in a blue moon.

他难得喝醉酒.

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He only comes here once in a blue moon.

他只是偶尔到这儿来一次.

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I go to a restaurant once in a blue moon.

我难得在外吃饭,也极少在饭店用膳.

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Barry only visits his parents once in a blue moon.

巴里很难得去看望他父母一次.

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Once in a blue moon you get some problems.

偶尔你也碰到一些麻烦.

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This draught occurs once in a blue moon.

这场旱灾是百年不遇的.

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