Bicycles are no longer the primary means of transportation in Beijing, a city where rising incomes have meant many commuters can afford to upgrade to cars.
自行车已经不是北京的主要交通工具了，这个城市里的人们随着收入的提高很多已经升级到汽车代步了。
Roman roads fell into disrepair and disuse during the Middle Age when the primary means of long-distance transportation were walking, horseback riding, or ox riding.
中世纪期间，主要的长途运输工具是：步行、骑马，或骑牛，因此，罗马的道路失修而被废弃。
The rapid development in science and technology today to solve the transportation demand management is increasingly becoming the primary means of urban transport problems.
在科技迅猛发展的今天，交通需求管理日益成为解决城市交通问题的主要手段。
The rapid development in science and technology today to solve the transportation demand management is increasingly becoming the primary means of urban transport problems.
在科技迅猛发展的今天，交通需求管理日益成为解决城市交通问题的主要手段。
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