a blue moon是什么意思

双语例句

(1)The story is just a blue moon.

这个故事根本就是件不可能的事。

(2)This is a chance in a blue moon.

这可是个难得的机会。

(3)She visits us once in a blue moon.

她难得来看我们一次。

(4)It is a chance once in a blue moon.

这是一个千载难逢的好机会。

(5)But what is a blue moon?

但是什么是蓝月亮呢？

(1)Yeah, but he did have to have a bunch of stitches and he said that only once in a blue moon does a dog's ear grow back, so still hoping.

可是他必须帮它缝好多针，而且他还说只有出现蓝月亮时狗才会再长出耳朵来的，所以还有一点点希望。《Friends Season 2》《老友记 第二季》