The original intention of "once in a blue moon" is once in a thousand years, and later it is said that the opportunity is very rare; Generally, it acts as a predicate, attribute and clause in a sentence; With praise.
not occurring once in a thousand years
Once in a thousand years. It is extremely rare and precious to describe opportunities.
I am an ordinary person, I am ridiculous and prosperous. The thickness of the award comes once in a blue moon. -Biography of South Shu Qi Gao Yu
Once in a thousand years. Describe the opportunity as rare and precious. Qi Yukun in the Southern Dynasty wrote in "On my deathbed, the table of my ancestors": "I am mediocre, I live a long life, and the prize is thick, which comes once in a blue moon. "Song Sima Guang's" Chen Sande Zazi Shang Dian ":"At this time, the chest and abdomen are not deficient, and they can't compare with others, and they die with sin. The sixteenth time in A Dream of Red Mansions: "That's a once-in-a-lifetime thing. "
Chapter 4 of Liu's Overpass: "Your boy will beg her again this time, but you can't kneel down. This is a once-in-a-lifetime opportunity. " Also known as "once in a blue moon". Qing Amon's "Broken Sleeve Woodworking": "I meditated for a long time, lay down on my side and played with my eyes, saying,' It's a once-in-a-lifetime thing. "Lao She's Camel Xiangzi V:" Bad money is so scarce that some colorful ones must be different and lucky. "