阐述了交通运输需求与供给行为的理论，并研究了交通运输结构系统和数学模型。
The supply and demand of traffic volume are discussed, some problems of transportation system and their mathematic models are studied.
交通运输业的影响因素很多，其中的一个重要因素就是产业结构。
There are a lot of factors that effect transport, one of which is industrial structure.
着力解决交通运输“卡脖子”路段，进一步优化能源结构。
We will work hard to resolve transportation bottlenecks and continue to upgrade energy structure.
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