treble 一般是指三倍的,与double相似.
/ ˈtrebl; ˋtrɛbl/ adj,n
three times as much or as many 三倍的; 三重的:
He earns treble my salary.他挣的钱是我的三倍.
v
[I,Tn] (cause sth to) become three times as much or as many （使某事物）增加到三倍:
He's trebled his earnings in two years.他两年间收入已增加两倍.*
另外在音乐上,treble还可以用于：
(a) highest voice in choral singing,esp the unbroken male voice
（合唱中的）最高音（尤指连续的男声）
(b) child with such a voice 唱最高音的儿童.
(c) part for such a voice 最高声部:
[attrib 作定语]的时候指：
high-pitched in tone 声调高的; 高音的; 尖声的:
a treble voice 尖利的嗓音
a treble recorder 高音竖笛
the treble clef,高音谱号.
