defensive structure英 [dɪˈfensɪv ˈstrʌktʃə(r)]美 [dɪˈfensɪv ˈstrʌktʃər]网络 防御结构; 防护结构网络英英释义nouna structure used to defend against attackthe artillery battered down the defensesSynonym:defensedefence双语例句