The story is just a blue moon.
这个故事根本就是件不可能的事。
This is a chance in a blue moon.
这可是个难得的机会。
She visits us once in a blue moon.
她难得来看我们一次。
It is a chance once in a blue moon.
这是一个千载难逢的好机会。
但是什么是蓝月亮呢？
This is a chance once in a blue moon.
这是个千载难逢的好机会。
This is a chance once in a blue moon.
这是一次难得的机遇。
This is a chance once in a blue moon.
这是个千载难逢的机会。
He only comes here once in a blue moon.
他只是偶尔到这儿来一次。
Such a chance comes once in a blue moon.
这样的机会极其难得。
Once in a blue moon is an informal phrase.
（千载难逢）是一个非正式短语。
Opportunity like this comes once in a blue moon.
这样的机会实在千载难逢。
You're the kinda guy, a girl finds in a blue moon.
你是那种人，在一个蓝色的月亮找到一个女孩。
It is once in a blue moon to see her do housework.
看见她做家务真是极为罕见啊。
How often do you drink beer? B: Eh... once in a blue moon!
你多久喝一次啤酒？B：呃……我难得喝一次！
Once in a blue moon. It doesn't mean that the moon is blue.
（千载难逢），它的意思可不是月亮是蓝色的。
The storm has lasted a blue moon, it should soon blow over.
风暴已持续很长时间，不久就该停下来了。
How I have been missing you! I haven't seen you in a blue moon.
我多么想念你呀！我已经好久没见到你了。
It's only once in a blue moon that you get an opportunity like that.
这样的机会对你来说真是千载难逢。
It is amazing! Once in a blue moon I got the first prize in the game.
太让我意外了，我竟然在比赛中得了第一。太难得了。
Don't give up a such a good opportunity; it only comes once in a blue moon.
不要放弃这个好机会；那是非常难得的。当副词用。
That murder was a mystery in a blue moon, but a clever detective cleared it up.
那次谋杀案长期以来一直是个谜，后来有个机灵的侦探揭开了真相。
The schoolmaster said that he was able to go to a play only once in a blue moon.
太实：这位校长说，他只在月亮变蓝时才去看戏。
I have almost forgotten what Jack looks like. I see him once in a blue moon now.
我几乎已经忘了杰克的模样了。现在我只是极难得地见过他一次。
I have almost forgotten what Jack looks like. I see him once in a blue moon now.
我几乎已经忘了杰克的模样了。现在我只是极难得地见过他一次。
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