波特兰是美国西北部俄勒冈州最大的城市,都市地区人口200多万,在美国排名第23。它不靠人口众多出名,而是以自行车出名,2012年被评为“对自行车最友好城市”。波特兰的自行车热始于20世纪90年代,市民们怀着对环保事业和公共健康的满腔热情,将自行车作为出行的首选。该市自行车网络日渐扩大,差 Portland is the largest city in the state of Oregon in the northwestern United States, with a population of more than 2 million in the metropolitan area and 23rd in the United States. It is not known by its population, it is famous for its bicycles, and in 2012 it was named “the friendliest city for bicycles”. Portland’s bike fever began in the 1990s, and citizens are passionate about the cause of the environment and public health, using bicycles as their first choice of travel. The city’s bicycle network is expanding and poor