，低
;Their profits have trebled in the last two years.
最近两年他们
利润增加了三
。
；最
声部；三层；三重；最声部Their profits have trebled in the last two years.
最近两年他们利润增加了三。
After uncovering of treble part we see valves underlaid by felt.
在揭露
部分以后我们看见毛毡支持阀门。
It's value has trebled.
它价值已增长到原来三。
His salary is treble mine.
他工资是我三。
They exist in four sizes: treble, tenor, bass, and double bass (violone).
、次中、低和双低（低提琴）。
Patricia metham, the headmistress, said the number of applicants from mainland China had trebled in the past three years.
该校女校长帕特里夏·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。
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