The Olympic Games take place once every four years.
奥林匹克运动会每4年举行一次。
Annie: Yes. The Olympic Games is held once every four years. The opportunity is rare.
安妮：对了，四年一后的奥运会，机会多么难得呀。
February 29 is not a holiday, but it is still special because it only comes once every four years.
二月二十九日不是假日，但因为它每四年才来一次，所以依然十分特别。
Inauguration Day occurs once every four years, about two and a half months after the national election.
就职日发生每四年一次，约两个半月后的全国选举。
A common festival for all football fans all over the world, the football world Cup, is 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。
It has been held once every four years. If it is canceled for some reasons, the game will still be counted orderly.
每四年举行一次，如因故不能举行，后数还按顺序计算。
Once every four years, the greatest athletes from all over the world gather together to take part in the Olympic games.
每隔四年，世界上最优秀的运动员都从四面八方汇集到一起参加奥林匹克盛会。
Olympics once every four years yesterday, who left the classroom last » I forget the English textbooks in the laboratory.
奥运会每四年开一次昨天谁最后一个离开教室？我把英语教科书忘记在实验室了。
Each of the four "sampling" areas takes one dry season to complete and then the cycle is repeated, so that each area is sampled once every four years.
在这四个“采样”区内的每一个地区进行的调查都要花一个旱季的时间，之后再重新开始这个循环，以便每四年完成一个区的调查工作。
The championship game of the World Baseball Classic, a 16-nation tournament held once every four years, is played in Dodger Stadium in Los Angeles.
世界棒球经典赛，每四年一届的由十六个国家代表队进行的赛事，将在洛杉矶道奇体育馆举行。
The intensity of brightness seen in Comet McNaught C/2009 R1—named after the Australian astronomer who first spotted it in September 2009—only occurs once every four years or so, Cook said.
以首次发现它的澳大利亚天文学家的名字所命名的麦克诺特彗星C/2009R1，其明亮强度每四年左右出现一次，库克说。
Once every three or four years, when conditions are right, the lake is covered with the pink birds as they stop flight to breed.
每隔三四年，条件适宜时，湖面上就会布满火烈鸟，它们停止飞行开始繁殖。
Elections take place every four years and Congress meets once a year.
每隔四年进行一次选举，国会一年开一次会。
Elections take place every four years and Congress meets once a year.
每隔四年进行一次选举，国会一年开一次会。
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