preventiveadj.预防的;防病的n.预防物;预防性措施
preventive test预防性试验
preventive laws预防性立法
preventive works充水因素
preventive trial预防性试验
preventive check预防性抑制
preventive means预防手段
preventive method防治方法
preventive target预防目标
preventive strike预防性打击
preventive safety预防性安全措施