English translation for "once in a blue moon"

出蓝月亮的时候(稀罕,少见)
出现蓝月亮（稀罕）
很难得，几乎不可能
机会机遇难的
极不可能
极难得；千载难逢
绝无仅有
难得一次，千载难逢
难得有一次
千载难逢，机会难得
千载难逢的机会
千载难逢地
稀罕

Related Translations:

oncer:  n.〔英口〕(为义务关系)只做一次的人；一年只到一次的人；从一而终的女子。

once command:  一次指令

once melted:  一次熔化

once for ado:  只一次, 一劳永逸

try once more:  再试一遍

once through system:  直流水系统

once pass reboiler:  一过式重沸器

carpenters once more:  夜话老卡

yesterday once more:  电影壁纸龙凤斗双陈故事同窗会往日重现昔日来临昔日烟花也寂寞昔日重来昔日重现又见昨天昨日再来昨日再现昨日重视昨天再来昨天重现

once filtration room:  一次筛分室

Example Sentences:

	1.	You get a chance like this only once in a blue moon . 这种机会你是很难得到的。
	2.	I see her once in a blue moon . 我难得看到她。
	3.	If the river overflows its banks, the garden gets flooded; but that only happens once in a blue moon . 如果河水漫过两岸，庭园就要淹没，不过那只是千载难逢的事。
	4.	Barry only visits his parents once in a blue moon 巴里很难得去看望他父母一次。
	5.	It was an opportunity that comes once in a blue moon 这种机会来一次可太难了。
	6.	I go to a restaurant once in a blue moon 我难得在外吃饭，也极少在饭店用膳。
	7.	I can ' t help but sneak a fag once in a blue moon 很少时候我会这样不能自拔的抽上一根
	8.	It ' s once in a blue moon that you get a chance like that 你得到了一个千载难逢的机会。
	9.	It ’ s once in a blue moon that you get a chance like that 你得到的是个千载难逢的机会。
	10.	Such a chance comes once in a blue moon 这样的确是的机会极其难得。

Similar Words：

"once i held a moon" English translation, "once i loved" English translation, "once i saw a little bird" English translation, "once i travelled seas to find my love" English translation, "once in a blue" English translation, "once in a life time opportunity" English translation, "once in a lifetime" English translation, "once in a lifetime exposure" English translation, "once in a liff" English translation, "once in a red moon" English translation