分馏fēnliú液体中含有几种挥发性不同的物质时,蒸馏液体,使它所含的成分互相分离{fractionation; fractional distillation; separation of a liquid containing several substances with different volatility into ingredients by distillation}: ～石油可以得到汽油、煤油等。{Gasoline and kerosene can be obtained through the fractionation of oil.}