名词 essential oil:

1. an oil having the odor or flavor of the plant from which it comes; used in perfume and flavorings

essentialsn.要件；概要essentialadj.本质的；必要的；重要的n.要素；必需品essential bradycardia[医] 自发性心搏徐缓essential amino acids必需氨基酸essential one-crime单纯一罪essential sovereignty本质性权力essential auxiliaries主要附属设备essential requirement基本要求essential rationality实质合理性essential distinction本质区别Essential fructosemia原发性果糖血症essential fructosuria原发性果糖尿症

1. Patchouli essential oil has traditionally found its uses as a traditional medicine in the East.
   广霍香精油，在东方，传说中被发现作为一种传统的药物使用。
2. The technical process and conditions for consecutive extraction of essential oil and hesperidin from orange peel were studied.
   研究了从柑桔皮渣中联合提取香精油和橙皮苷的工艺条件。