每四年一次英文

quadrennial 1. 四年的 2. （每）四年（发生）一次的 3. 每四年一次的事（如四周年庆祝活动等） 四年举行一次 It has been held once every four years.足球世界杯四年举办一次, 是全世界球迷的共同节日。 A common festival for all football fans all over the world, the Football World Cup, is held once every four years.

四年一次每四年一次 once every four years ; Every four year；once four yearsquadrennial英 [kwɒ'drenɪəl] 美 [kwɑd'rɛnɪəl] 跟读 口语练习adj. 每四年一次的；连续四年的n. 第四周年纪念

1.Olympic games is held every four years .2.Usually, trees are planted in spring .3.I think two bridges need to be built.I think two bridges need be built.（这句是把need看做是情态动词，但是好象还是没有上一句好）

quadrennially

应该是every four years. 当形容词讲时,each是强调在两个或两个以上的人或物中“各自的”,比如说each girl,each person,each one.