quadrupling

英文解釋：

名詞 quadrupling:

1. increase by a factor of four

動詞 quadruple:

1. increase fourfold
   同義詞：quadruple

中英例句：

1. Their profits have quadrupled/They have quadrupled their profits in ten years.
   他們的利潤十年中增長至四倍[他們使利潤在十年中增長至四倍]。