15-04-08 Paris is to double the number of cycling lanes by 2020 as part of its Socialist mayor's push to turn the city into the world's bike capital. 隶属社会党的巴黎市长力争将巴黎打造为世界自行车之都，其中一项计划是到2020年，巴黎的自行车道长度将是目前的两倍...