每三年的英文

triennially

• 每:    every; each; per
• 三年:    triennium
• 每三年地:    triennially

例句与用法

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1. I have a furlough every three years .
   我每三年休假一次。
2. If one-third of the stars are single stars with planets, then planetary systems are born, on the average, every three years .
   如果这些恒星中有三分之一是拥有行星的单星，那么平均每三年就会诞生一个行星系。
3. Yes , less frequent than once every three years
   有，少于每三年一次
4. All aici certifications shall be renewed every three ( 3 ) years
   所有aici资格认证必须每三年更新一次。