fractionation by distillation

• 蒸馏分离

fractionation by distillation的用法和样例：

例句

1. The product is separated by distillation into gasoline and gas oil.
   这种产品是用蒸馏分离出气油和粗柴油。
2. In the early work, separation of the products depended on distillation.
   在早期的工作中，产物是靠蒸馏分离。