铁路货运公司只能无奈地把美铁未支付的那些费用当作一部分运营成本。 如果负担再加重的话，他们的士气恐怕很难再提升起来。
Freight-rail people regard this glumly as just part of the cost of doing business, but their spirits will hardly lift if the burden grows.
除运煤外，铁路还经营客运，客运收入足以满足火车运营的费用。
Except for the coal conveyor, the passenger service was also operated by the railway and the revenue from the passenger transport was sufficient for the expenses of operation of train.
铁路双层集装箱运输是一种运输速度快、运输费用省、单位运营成本低、能使运能提高的铁路货运新产品。
Double-stack container trains are the new railway products which can increase transport capacity with higher speed and lower unit operating cost.
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