alkaloid例句
Cocaine is a crystalline tropane alkaloid that is obtained from the leaves of the coca plant..可卡因是一种结晶状的莨菪生物碱，是从古柯叶中提取得来的。
alkaloid英语解释[化]生物碱英释中释nany of a group of nitrogenous basic compounds found in plants, typically insoluble in water and physiologically active
