This is a compound noun chain (复合名词链). It starts with one noun (for example, room). Then, you add another noun (for example, service) to make a compound noun: room service.
21世纪报社版权所有，未经书面授权，禁止转载或建立镜像。 主办单位：中国日报社 Copyright by 21st Century English Education Media All Rights Reserved 版权所有 复制必究 京ICP备13028878号-12京公网安备 11010502033664号
京公网安备 11010502033664号
