n.自衛(wèi)；自我保護

He said that he killed the man in self defence. 他說是因自衛(wèi)而殺死那個人的。

A weapon carried for self defence is quite different. 以自衛(wèi)為目的攜帶的武器有很大區(qū)別。

Activities organized by civilians for their own protection in time of war or disaster. 戰(zhàn)爭或者災(zāi)難時期國民自我保護的行為。