求翻译：轨道交通是城市交通的主要形式之一，由于其建设投资巨大、运营成本较高，并且具有很强的公益性，其建设和运营需要由政府直接投资和提供补贴。是什么意思？

Rail transport is the main form of urban transport, due to its huge capital investment, high operating costs, and has a strong public interest, its need for the construction and operation of direct government investment and subsidies.

Rail transportation is one of the main forms of city traffic, because of its construction and investment enormous, cost of operations, and have strong public good character, and its construction and operation by the Government to provide subsidies and direct investment.

The orbital transportation is one of municipal transportation main forms, because its construction investment huge, the operation cost is high, and has the very strong public welfare, its construction and the operation need and provide the subsidy by the government direct investment.

Rail transport is one of the main forms of urban transport, due to the construction of huge investment, operational costs higher and has a very strong public interest, their construction and operation needs direct investments and subsidies by the Government.

Rail transport is one of the main forms of urban transport, due to the construction of huge investment, operational costs higher and has a very strong public interest, their construction and operation needs direct investments and subsidies by the Government.