动词 fractionate:

1. separate into constituents or fractions containing concentrated constituents

2. obtain by a fractional process

fractions形态fractionn.小部分；少许；分数；片段fractionating diffusion pump分馏扩散泵fractionated crystallization分级结晶fraction composition of fuel燃料的馏分组成fractionation crystallization分级结晶法fractions of cooking gasoline焦化汽油馏分fraction of hydrogen addition掺氢比fractionating tube with bulbs带球的分馏管Fractions of ethanol extracts醇提萃取部位fraction concentration of gas气体浓度分数fractionation by distillation蒸馏分离

1. As the solution to be purified is heated, its vapors rise to the fractionating column.
   当要被提纯的液体受热时，它的蒸汽上升到分馏柱。
2. Reaction is carried out under a fractionating column that allows aldehyde to pass but returns alcohol to the reaction vessel.
   反应是在装有分馏柱的反应器中进行的，分馏柱能让醛通过但使醇回流到反应器中。