Cities are promoting bicycling for transportation as an antidote to increased traffic congestion, obesity and related health issues, and air pollution. However, both research and practice have been...

中文翻译：

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众包数据，用于自行车研究和实践

城市正在促进骑自行车出行，以解决交通拥堵，肥胖及相关健康问题以及空气污染问题。但是，研究和实践都已经...