triple
/ˈtrɪpl; `trɪpl/ adj[usu attrib 通常作定语]
1 having three parts or involving three people, groups, etc 有三部分的; 涉及三人、 三团体等的
The plan has a triplepurpose, ie three purposes. 这个计画有三个目的.
tripletime, ie rhythm with three beats to the bar 三拍子（每节有三拍的节奏）
a triple alliance, ie between three countries 三国同盟.
2 three times as much or as many 三倍的; 三重的
travelling at triple the speed 以三倍的速度前进
a triple whisky, ie a glass containing three timesthe usual quantity 一杯含三倍分量的威士忌酒
a triplemurderer, ie one who has killed three people 谋杀三个人的人. triple, v [I, Tn]
(cause sth to) become three times as much or as many （使某物）增至三倍, 成三倍
Output has tripled. 产量已增加到三倍.