She visits us once in a blue moon.
她难得来看我们一次。
The chance is once in a blue moon.
这机会仅在蓝月亮里一次。
It is a chance once in a blue moon.
这是一个千载难逢的好机会。
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.
这是个千载难逢的机会。
This is a chance once in a blue moon.
这是一次难得的机遇。
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。
Such a chance comes once in a blue moon.
这种机会是千载难逢。
Once in a blue moon is an informal phrase.
（千载难逢）是一个非正式短语。
Sichuan earthquake is once in a blue moon.
四川地震是百年一遇。
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。
That kind of chance comes once in a blue moon.
那是千载难逢的机会。
Opportunity like this comes once in a blue moon.
这样的机会实在千载难逢。
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。
You get a chance like this only once in a blue moon.
这可是千载难逢的机会呢。
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。
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。
My girlfriend helped me wash dishes this evening; It's once in a blue moon.
今晚我的女友帮我洗了碗，真是太阳从西边出来了。
Brian has very little contact with his sister. They see each other once in a blue moon.
布莱恩和他姐姐没有什么联系。他们很少见面。
See once in a while, once in a blue moon, people will surprise you, and once in a while people may even take your breath away.
偶然相遇，别人总能给你意外的惊喜，甚或乎，让你的呼吸停顿(一见钟情)。
Just once in a very blue moon.
在难得一见的蓝色月光下。
How could you miss such a once-in-a-blue-moon chance?
你怎么能错过这个千载难逢的机会呢？
How could you miss such a once-in-a-blue-moon chance?
你怎么能错过这个千载难逢的机会呢？
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