给你的自行车穿件“衣服”吧!People often ride bikes in the city. But if you want to ride in a mountainous area, you might need to change your bike’s tires (轮胎) or even use a different bike. This is quite inconvenient for city bikers.
中报二十一世纪(北京)传媒科技有限公司版权所有,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 网站信息网络传播视听节目许可证0108263 京ICP备2024066071号-1京公网安备 11010502033664号