subtractive process

• 精制过程

subtractive process的用法和样例：

例句

1. In the water extracting and alcohalprecipitating process of Gukang formula,psoralen could be changed into isopsoralen.
   补骨脂在骨康方提取精制过程中，补骨脂素可部分转化成异补骨脂素。