Imagine the ZIP code was instead a customer ID number in an order-tracking application.
假设ZIP代码被替换成了订单跟踪应用程序中的客户ID号码。
The country code is required even if you are tracking a US domestic shipment.
即使您查询的是美国国内邮件，也必须输入国码。
The country code is required even if you are tracking a US domestic shipment.
即使您查询的是美国国内邮件，也必须输入国码。
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