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

Then, once again proved a positive correlation between logistics service quality and online purchase behavior in the long term, so to improve the quality of logistics services can increase sales.

Then, once again proved that in the long-term logistics service and purchase on the Internet with a positive correlation between behavior and improve logistics service can increase your sales.

Then, once more proved in 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.

Then, again, in the long term logistics service quality and online purchase behavior has a positive correlation, so improving the quality of logistics services can increase sales.

正在翻译，请等待...