constituting number twelve in a sequence; 12th 第十二 the twelfth of November. 11月12日。 his twelfth birthday. 他12岁生日。 the twelfth in a series of essays. 系列散文中的第12篇。 ■(a twelfth/one twelfth)each of twelve equal parts into which something is or may be divided 十二分之一 ■(Music)an interval or chord spanning an octave and a fifth in the diatonic scale, or a note separated from another by this interval (乐)十二度音程;十二度和音;十二度音 ■(the Twelfth 或 the Glorious Twelfth)(in the UK) 12 August, the day on which the grouse-shooting season begins (英国)八月十二日(狩猎松鸡的开始日) ■(the Twelfth)12 July, celebrated by upholders of Protestant supremacy in Ireland as the anniversary of William III's victory over James II at the Battle of the Boyne 七月十二日(爱尔兰新教至上主义者所庆祝的威廉三世在博因战役中击败詹姆士二世的周年纪念日)