Mice that lack the receptor do not become dependent no matter how much cocaine they are given. 缺少这个受体的小鼠，无论服用过多少古柯碱，都不会上瘾。
If the GCMS fingerprint of a sample matches that of heroin or cocaine, it is nearly impossible for even the best defense lawyer to challenge the result successfully. 如果样品透过气相层析质谱分析仪呈现出来的特徵，符合海洛因或古柯碱，那麽就算是请到王牌辩护律师，也不可能成功打败这样的结果。
The drug addict was snorting cocaine every night. 这个瘾君子每天晚上都用鼻吸食可卡因。
Stephen has just confessed to taking cocaine. 史蒂芬刚刚坦白说自己吸食过可卡因。
