olympics once every four years …
奥运会每四年开一次…
since then the games have been held in different cities once every four years except in 1916, 1940 and 1944.
从此以后,该运动会每四年都要在不同的城市举行(除1916年、1940年以及1944年外)。
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。
olympic games are held in different countries once every four years .
奥运会在不同的国家每四年举行一次。
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。