但从2006年至今，公司在进一步提高物流服务质量方面遇到了很大的瓶颈。
But since 2006, the company further improve the quality of logistics services encountered a lot of bottlenecks.
运输模型在物流和供应链管理中为降低物资消耗和提高服务质量发挥着重要作用。
Transportation models play an important role in logistics and supply chain management for reducing cost and improving service.
只有从整个供应链的理性选择出发，才能实现各参与方利益的最大化，提高供应链整体物流服务质量。
Only when the whole supply chain of rational choice can be achieved to maximize the interests of the participants and improve overall supply chain logistics service quality.
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