求翻译：再次，证明长期内物流服务质量与网上购买行为具有正相关关系，因此提高物流服务质量可以提高销售量。是什么意思？

Again, to prove the long-term positive correlation between the quality of logistics services and online purchasing behavior, thereby increasing the logistics service quality can increase sales.

Once again, proof that long-term logistics service and purchase on the Internet with a positive correlation between behavior and therefore improve logistics services can increase your sales.

Once more, proved on the long-term in physical distribution grade of service and the net purchases the behavior to have the correlational dependence, therefore improves the physical distribution grade of service to be possible to enhance the sales volume.

Once again, prove long term logistics service quality and online purchase behavior has a positive correlation, therefore improving the quality of logistics services can increase sales.

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