The Public Utilities Commission inspects us once a year.

公用设施委员会每年到我们这里视察一次。

《柯林斯英汉双解大词典》

Hey, it's a once a year celebration!

嘿，这是一年一次的节日！

youdao

Hey, it's a once a year celebration!

嘿，这是一年一次的节日！

youdao

About once a year, houses made from adobe should be given a layer of mud.

VOA: special.2009.01.12

Pretty much I think about it only once a year, when I'm giving this very lecture.

最多是一年想一次，当我要上这节课时。

耶鲁公开课 - 死亡课程节选

Yeah, I actually, we have a concert here on Main Green once a year called "Spring Weekend"

是的，我们每年都会在梅因格林举办一场音乐会，叫做“春日周末”，

校园生活 - SpeakingMax英语口语达人

Kirven and Antonio have had a long-term relationship with COCA, teaching young dancers at least once a year.

CNN: Alvin Ailey principal dancers retire to give back

But you can only be reminded of how awful fruitcake is once a year.

WSJ: For Your iPad 2, Nook Tablet or Kindle Fire, Essential Tablet Tools

There are 15% of such parents who only see their children once a year.

BBC: Many elderly isolated from far-away family, charity says