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。

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。

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。

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。

If you only send faxes once in a blue moon, do it from Staples or a copy shop.

如果您只发送传真一次在一蓝色的月亮，也从史泰博或复印店了。

If you only send faxes once in a blue moon, do it from Staples or a copy shop.

如果您只发送传真一次在一蓝色的月亮，也从史泰博或复印店了。美。

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。

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。

We seldom met each other anymore, maybe once in a blue moon on a family gathering.

我们很久才见一次面，在大家庭的聚会上。