residential use家庭用气residentialadj.住宅的；居住的residential distribution system小区分布residential water supply system小区给水系统residential and recreation room居住和活动室residential area of countryside农村居艮董residential registration system户籍制度residential environment science人居环境科学residential quarter environment居住区环境residential service consumption居民服务消费residential real estate project住宅型房地产项目Residential architecture design住宅建筑设计