一年一度 (yī nián yī dù) — once a year, annually

定義

例文

• 每年秋天，我们公司都会举行一年一度的团建活动。
  Měi nián qiū tiān, wǒ men gōng sī dōu huì jǔ xíng yī nián yī dù de tuán jiàn huó dòng.
  Every autumn, our company holds an annual team-building event.
• 这是北京一年一度的庙会，吸引了很多游客。
  Zhè shì běi jīng yī nián yī dù de miào huì, xī yǐn le hěn duō yóu kè.
  This is Beijing's annual temple fair, which attracts many tourists.
• 一年一度的毕业典礼是大学最重要的活动之一。
  yī nián yī dù De bì yè diǎn lǐ shì dà xué zuì zhòng yào de huó dòng zhī yī.
  The annual graduation ceremony is one of the most important events at the university.

文法