quadrupling

名词 quadrupling:

1. increase by a factor of four

动词 quadruple:

1. increase fourfold
   同义词：quadruple

1. Their profits have quadrupled/They have quadrupled their profits in ten years.
   他们的利润十年中增长至四倍[他们使利润在十年中增长至四倍]。