n.预防；防止；预防措施；预防药adj.预防的；防止的； 变形： 复数：preventives 英英释义： preventive[ pri'ventiv, pri:- ]n.remedy that prevents or slows the course of an illness or disease同义词：preventativeprophylacticany obstruction that impedes or is burdensome同义词：hindrancehinderancehitchpr