购买说明：购买教材的辩手们请仔细填写邮寄地址及联系方式。（订单非质量问题不支持退款且目前不支持海外邮寄）
Purchase Instructions: Debaters who
purchase textbooks should fill in their
mailing address and contact information
carefully. (Refunds are not supported for
orders with nonquality problems, and overseas mailing is not supported at
present)