trebling

Their profits have trebled in the last two years.

最近两年他们利润增加了三倍。

After uncovering of treble part we see valves underlaid by felt.

在揭露高音部分以后们看见毛毡支持。

It's value has trebled.

它价值已增长到原来三倍。

His salary is treble mine.

他工资是三倍。

They exist in four sizes: treble, tenor, bass, and double bass (violone).

高音、次中音、低音和双低音（低音提琴）。

Patricia metham, the headmistress, said the number of applicants from mainland China had trebled in the past three years.

女长帕特里夏·梅塔姆说，从中国大陆来申请人数量过去3年已经翻了三番。