Our country 's municipal resident structure, environmental protection and residents' economic conditions, decide the practical and necessary existence of bicycle traffic.
我国的城市居住结构、环境保护及居民经济条件决定了自行车交通存在的现实性和必然性。
Our country 's municipal resident structure, environmental protection and residents' economic conditions, decide the practical and necessary existence of bicycle traffic.
我国的城市居住结构、环境保护及居民经济条件决定了自行车交通存在的现实性和必然性。
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