从2009年到2012年，中国的电子商务市场以平均71%的比例增长，而美国是13%，其总规模预计在2018年将达到33亿元。中国的企业和零售商不得不调整他们的销售策略，以便于在线竞争对手竞争。然而，物流(logistics)对于电子商务的发展是一个主要保障，阿里巴巴集团正在和中国物流公司合作来改进全国范围的基础设施建设和物流网络。

【参考译文】

China’s e-commerce market has grown at an average rate of 71%percent from 2009 to 2012, compared with 13percent in the United States, and its total size is expected to reach 3.3bilion yuan by 2018.chinese companies together with retail outlets have had to regulate their sales strategies to compete with online rivals. Logistics, however, pose a major obstacle to e-commerce development, and Alibaba Corporation is now working with Chinese Logistics firms to improve nationwide infrastructure delivery networks.

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