constituting number four in a sequence; 4th 第四 the fourth and fifth centuries. 第4和第5世纪。 there were three bedrooms, with potential for a fourth. 有三间卧室,还可扩出第四间。 ■(a fourth/one fourth)(chiefly US)a quarter (主美)四分之一 nearly three fourths of that money is now gone. 那笔钱的近3/4已花掉了。 ■the fourth finisher or position in a race or competition (比赛或竞赛的)第四名;第四位 he could do no better than finish fourth. 他只能跑到第四名。 ■the fourth (and often highest) in a sequence of a vehicle's gears 汽车第四挡(通常是最高挡) he took the corner at the end of the road in fourth. 他在路尽头用四挡转弯。 ■(chiefly Brit.)the fourth form of a school or college (主英)四年级 ■fourthly (used to introduce a fourth point or reason) 第四(用来引出第四个要点或原因) third, visit popular attractions during lunch; fourth, stay late. 第三,午饭时间参观热门景点;第四,在那里多逗留些时间。 ■(Music)an interval spanning four consecutive notes in a diatonic scale, in particular also perfect fourth an interval of two tones and a semitone (e.g. C to F) (乐)四度音程 ■(Music)the note which is higher by this interval than the tonic of a diatonic scale or root of a chord (乐)四度音