The drug addict was snorting cocaine every night. 這個癮君子每天晚上都用鼻吸食可卡因。
Stephen has just confessed to taking cocaine. 史蒂芬剛剛坦白說自己吸食過可卡因。
Mice that lack the receptor do not become dependent no matter how much cocaine they are given. 缺少這個受體的小鼠，無論服用過多少古柯鹼，都不會上癮。
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. 如果樣品透過氣相層析質譜分析儀呈現出來的特徵，符合海洛因或古柯鹼，那麽就算是請到王牌辯護律師，也不可能成功打敗這樣的結果。
