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Welcome to English in a Minute, where we teach you all about idioms in American English.
歡迎收聽《一分鐘英語》，在這里我們將教您一些美式英語中的俚語。
Have you even heard the American English idioms...
你聽過這個美式俚語么？
Once in a blue moon. It doesn't mean that the moon is blue.
Once in a blue moon（千載難逢），它的意思可不是月亮是藍色的。
So let's listen to this American English conversation to find out how it is used:
下面讓我們來聽聽這段美語對話，看看這個短語的用法：
Where did you say your brother lives?
你兄弟住在哪？
He lives all the way in Minnesota, so I never get to see him.
他住在明尼蘇達州，但是到處搬來搬去。所以我沒去看過他。
I only get to see him once in a blue moon.
我只難得有一次拜訪過他。（once in a blue moon）
Once in a blue moon is a common way of saying that something does not happen often.
once in a blue moon意思是某事不經(jīng)常發(fā)生，這是一個很常見的用法。
But what is a blue moon?
但是什么是藍月亮呢？
We typically see a full moon once a month.
一般來說，我們一個月會看到一次滿月。
And seeing two full moons in the same month is rare.
在一個月中出現(xiàn)兩個滿月是很罕見的。
The second full moon in a particular month is called the blue moon.
某個特別的月份中的第二個滿月就叫藍月亮。
Once in a blue moon is an informal phrase.
Once in a blue moon（千載難逢） 是一個非正式短語。
And that's English in a Minute.
以上就是本期的《一分鐘英語》。
