preventiveadj.预防的；防病的n.预防物；预防性措施preventive grinding预防性打磨preventive grouting预防性灌浆Preventive services预防服务preventive measures预防措施Preventive analytic预防分析preventive diplomacy预防外交preventive repairing预防修理,预防性修理preventive servicing预防保修preventive radiation预防性照射preventive technique防治技术