protective-[医] 保护疗法protectiveadj.保护的；防卫的protective headgear安全帽protective strategy保护策略protective additive保护剂protective proteins[医] 保护蛋白, 防御蛋白protective earthing保护接地protective products防护材料protective distance保护距离protective ointment保护性油膏, 防护油膏protective behavior防御行为protective reflexes防御反射