n.自卫；自我保护
He said that he killed the man in self defence. 他说是因自卫而杀死那个人的。
A weapon carried for self defence is quite different. 以自卫为目的携带的武器有很大区别。
Activities organized by civilians for their own protection in time of war or disaster. 战争或者灾难时期国民自我保护的行为。
