将小型运输组合成大型运输，是降低单位运输重量成本的主要方法。
Grouping small shipment into large ones is the primary method to lower cost per unit of weight in transportation.
此方案建议分离隶属于Snam Rete Gas的储存和运输单位。
It recommended the separation of ownership of SRG's storage and transport units.
实际上，没运输一单位的货物，卡车消耗的能量是火车的十倍之多。
In fact trucks consume 10 times more energy per than trains per unit of cargo.
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