Peppermint is one of the most widely grown plants in China. Peppermint Oil and Menthol Crystal are important raw materials of medicines, sweets, alcohols and drinks.
薄荷是我国栽培面积最大的香料植物之一，薄荷油、薄荷脑是药品、糖果、烟草、酒类、饮料等重要原料。
Although 2% menthol crystal or 5% eucalyptus oil was effective as a natural penetration enhancer when used alone, the average penetration rate reached only half of that of 8% azone.
天然类促进剂单用时，2%薄荷醇和5%桉叶油促透效果较佳，但平均渗透速率约为8%氮酮的一半。
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