柯林斯词典freebase /ˈfriːˌbeɪs/ 1. N cocaine that has been refined by heating it in ether or some other solvent (在乙醚或其它溶剂中加热过的)精炼可卡因[slang] 2. V to refine (cocaine) in this way 用乙醚等加热精炼(可卡因) 返回 free base