The railroad industry as a whole, despite its brightening fortunes, still does not earn enough to cover the cost of the capital it must invest to keep up with its surging traffic.
主干:The railroad industry still does not earn enough to cover the cost
动词不定式短语做目的状语:to keep up with its surging traffic。
翻译:从整体来说,虽然铁路工业有耀眼的资产,但它的收入仍然不足以支付为满足不断增长的运输需要而进行的固定资产投资。
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