清单9解析这个购物车XML文件并生成一个账单，该账单显示项目合计和采购总计（见 清单10）。
The example in Listing 9 parses the shopping cart XML file and generates a bill with the individual item totals and the sum total for the purchase ( Listing 10).
清单9解析这个购物车XML文件并生成一个账单，该账单显示项目合计和采购总计（见 清单10）。
The example in Listing 9 parses the shopping cart XML file and generates a bill with the individual item totals and the sum total for the purchase ( Listing 10).
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