treble

音标发音

More than 7 million shares changed hands, treble the normal daily average.
有700多万股换手，是通常日平均成交量的3倍。
They will have to pay much more when rents treble in January.
一月份房租增加两倍时，他们将被迫多付不少钱。
to turn up the treble on the stereo
把立体声唱机的高音音量调大
to turn up the treble on the stereo
把立体声唱机的高音音量调大
More than 7 million shares changed hands, treble the normal daily average.
有700多万股换手，是通常日平均成交量的3倍。

three times greater in amount, number, or size
to increase three times in size or amount, or to make something do this
being or relating to a boy's voice that sings the highest notes, or an instrument that plays the highest notes
(SINGER) a boy with a treble voice
(THREE WINS) an occasion when a football club wins three major competitions in a single season

If something trebles or if you treble it, it becomes three times greater in number or amount than it was.
If one thing is treble the size or amount of another thing, it is three times greater in size or amount. 3
On a stereo system or radio, the treble is the ability to reproduce the higher musical notes. The treble is also the knob which controls this.