once in a blue moon

How can you let such a golden opportunity to make big money slip through your fingers? It was an opportunity that comes once in a blue moon.

这样一个发大财的机会千载难逢，你怎么能眼睁睁地让它溜掉呢。

In recent years, we don't often get a chance to visit our grandparents. They live so far away. We get to see them once in a blue moon.

最近几年，我们很少有机会去看望祖父母。他们住的太远了，见一面真有千载难逢之感。

His parents are very strict with him and allow him to go out with his pals in the evening only once in a blue moon.

他的父母亲对他很严格，难得准许他和朋友们在晚上一起出去。

Sally: Wow, this is really a chance once in a blue moon. Please invite me to go with you!

哇，这真是千载难逢的好机会。求求你邀请我跟你一起去嘛！

He is not very keen on swimming. Only once in a blue moon do we meet him in the swimming pool.

他不喜欢游泳，我们很难得在游泳池遇到他。

Since our parents live so far away, in recent year we get to see them once in a blue moon.

因为父母住在远处，所以我们近来很少和他们见面。

Since our parents live so far away, recently we get to see them once in a blue moon.

因为父母住得比较远，所以我们近来很少和他们见面。

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）

And he said that only once in a blue moon does a dog's ear grow back.

而且他还说除非天下红雨狗才会再长出耳朵来的

The most famous actors of the day. But chances like this happen once in a blue moon !

但是象这样的机会发生在蓝色的月球也仅一次！

It was an opportunity that comes once in a blue moon.

千载难逢的机会降临了。

Once in a blue moon my wife and I eat at a very expensive restaurant.

我们夫妻俩很少上昂贵的餐厅吃饭。

Such a chance comes once in a blue moon.

这样的机会极其难得。

My girlfriend helped me wash dishes yesterday. It was once in a blue moon. Usually, she doesn't do any housework at all.

今晚我的女友帮我洗了碗，真是千载难逢啊。通常，她不做家务活的。

Even if he should be late once in a blue moon, he would tell us in advance.

即使他偶尔迟到一次，他也会事先通知我们。

Sex marathons, that last a few hours or even all night, happen once in a blue moon for most couples.

持续几个小时甚至一整晚的性爱马拉松，大多数情侣都千载难逢地有过那么一次。

You will be able to see a dinosaur once in a blue moon. Why don't you go to the exhibition?

很难有机会看到恐龙的。为什么不去看看那个展览？

My sister lives in Alaska, so I only get to see her once in a blue moon.

我的姐姐住在阿拉斯加，所以我很难得才见她一面。例句

See, once in a while -- once in a blue moon -- people will surprise you.

明白了吧，偶尔或者千载难逢地，人们会让你惊奇的。

My girlfriend helped me wash dishes this evening; It's once in a blue moon. Usually, he doesn't do any housework at all.

今晚我的女友帮我洗了碗，真是千载难逢啊。通常，她根本不做家务活的。