Once in a blue moon is an informal phrase.

Once in a blue moon（千载难逢） 是非正式短语。

Luke can hear beautiful music and see a big blue moon.

Luke能听到美妙音乐，看到轮又大又亮。

But this year there will be 13 with two full moons in October and when you have two full moons in one month, you have what's said to be a " blue moon" .

但是今年会有 13 次满， 其中 10 将出现两次，而内有两满时，你们就会看到所谓“”。

" I do it once in a blue moon."

“我很少那样做。”

And another thing to note is that the moon does not pink during the pink moon, red during the blood moon or blue during the blue moon.

另件需要注意是，在粉期间亮不会是粉红色，在血期间亮不会是红色，在期间亮不会是色。

A " blue moon" is a long or seemingly long period of time.

" " 是很长或看起来很长段时间。

My brother lives in Australia so I see him once in a blue moon.

我哥哥住在澳大利亚，所以我很少见到他。

Now I punish myself every blue moon.

现在我逢就惩罚自己。

Once in a blue moon simply means very rarely.

“Once in a blue moon”意思是很少。

Remember or notice: if it's a long adverb, an adverbial clause like " once in a blue moon" , it goes at the end, right?

记住，如果它是长副词，状语从句，例如“once in a blue moon”，它要放在后面。

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亮时，狗才会再长出耳朵来，所以还有点点希望。

We wanted to find out what the people eat for breakfast each morning and any special breakfasts they like to have once in a blue moon.

我们想知道人们每天早上早餐吃什么，以及他们喜欢吃什么特别早餐。

For example, I go to the movies once in a blue moon and this just means I go to the movies very rarely or not often.

例如，我难得才去次电影院，这意味着我很少或者几乎不去看电影。

NASA noted that when the blue moon arrived, the planet Saturn was just a few days from its closest and brightest appearance of the year from Earth.

NASA出，亮出现时，土星距离它年中距离地球最近、最明亮时候只有几天时间。

Whereas before maybe once in a blue moon, I'd film a video of myself, send it to a friend, they'd reply a few days later.

而以前我可能会偶尔破天荒地给自己拍段视频，发给朋友，几天后他们会回复。

Saturn appeared as a bright " star" to the upper right of the blue moon.

在这颗亮右上角，土星以颗明亮“恒星”形式出现。

Once in a blue moon, we get two full moons in one-month, which typically occurs once every two or three years.

谈及亮，我们看到中出现两次满，这种情况般两三年会发生次。

Once in a blue moon, a student came along who made teaching almost seem worth it.

值得去教学生实属难得。

It is rare enough that English speakers use the expression once in a blue moon to describe something that does not happen often!

这类现象极其罕见，因此，说英语人常用“千载难逢（once in a blue moon）”形容少见事情。

And parts of the world are getting to see a blue moon, a super moon, and a total lunar eclipse all at once.

世界部分地区会同时看到亮，超级亮和全食。