Triple means consisting of three things or parts.
a triple somersault.
连翻三个筋斗。
If something is triple the amount or size of another thing, it is three times as large.
The mine reportedly had an accident rate triple the national average.
据报道,该矿的事故发生率是全国平均水平的三倍。
triples , tripling , tripled
If something triples or if you triple it, it becomes three times as large in size or number.
treble
I got a fantastic new job and my salary tripled.
我得到了一份极好的新工作,薪水是原来的三倍。
The exhibition has tripled in size from last year.
这个展览会的面积是去年的三倍。