The essential oil and extractum are extracted from its stem, leaf and flower by steam distillation and solvent extraction. According to the analysis, it contains 0.1003% essential oil and 0.74% extraction in average.是什么意思_The essential oil and extractum are extracted from its stem, leaf and flower by steam distillation and solvent extraction. According to the analysis, it contains 0.1003% essential oil and 0.74% extraction in average.在线翻译_英语_读音_用法_例句