In accordance with the needs for preparation against war,China has identified cities and regions for the conduct of civil air defense,and urban civil air defense is taken as the focal point of civil air defense.是什么意思_In accordance with the needs for preparation against war,China has identified cities and regions for the conduct of civil air defense,and urban civil air defense is taken as the focal point of civil air defense.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句