背包自行车能源价格日益上涨的今天,自行车作为一种环保而轻便的交通工具正受到越来越多人的重视。但是,由于城市的发展,留给自行车的空间却越来越小,地铁上、公交车上都不许携带它们,转车成为了自行车一族最大的烦 Backpack Bike Energy prices are on the rise Today, biking is gaining more and more attention as an environmentally friendly and lightweight vehicle. However, due to the development of the city, the space left for the bicycles is getting smaller and smaller. On the subway, the buses are not allowed to carry them. The transfer has become the biggest annoyance of bicycle owners