预试

fāng fǎ cǎi yòng zhí wù huà xué chéng fèn xì tǒng yù shì fǎ hé zhuān xiàng yù shì fǎ

方法采用植物化学成分系统预试法和专项预试法。

Methods The methods of systematic pretest and individual pretest were adopted.