explo-sion-proof lamp 防爆灯
progressive explo-ration 滚动勘探
This paper is a systematic explo-ration of China's urban transportation plan-ning history and a summary of challenges faced by China's urban transportation planning based on the former.
系统回顾了中国城市交通规划的历史，并在此基础上总结了中国城市交通规划所面临的主要挑战。
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