相关单词近義詞 security 安全, defense 防衛, entrenchment 掘壕溝, dike 堤垻, wall 牆壁, bulwark 壁壘, fortification 防禦工事（尤指堡壘、要塞..., embankment 堤防, bastion 稜堡, earthwork 土方工程, battlement 城垛, parapet 低矮擋牆, barricade 【C】路障, barrier 柵欄臨近詞Ramsay, rampant, rampart n., rampart protection, Rampart of Chuansha 返回 ramparting