英语语法高手帮忙分析下这个句子
And after declining for several years,the prices of Amecica's imports from China junped by 5.3%in the year to July,pushing up the prices of goods in Wal-mart,where many Americans shop.
这个句子里的“pushing...”这个分句是整个句中的什么成分,并且我感觉最后一个分句有问题,读不通的感觉