primary distillation of crude oil

例句：

1. 1. The primary distillation process is crucial for the purificationof crude oil.
   初级蒸馏过程对于原油的提纯至关重要。
2. 2. In primary distillation, the crude oil is first heated andthen separated into its constituent components.
   在初级蒸馏过程中，原油首先被加热并分离成其组成部分。
3. 3. The primarydistillation column is used to separate thelight ends from the heavy ends of thefeedstock.
   初级蒸馏塔用于将原料的轻组分与重组分分离。