网上购票的旅客可以用他们的身份证验票，不需要排队购买纸质票。

Travelers who have bought tickets online can use their ID cards instead of waiting in line for paper tickets.

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再次从消息中提取出客户ID，并用它在数据库中查询这位客户购买的商品的相关信息。

The customer ID is also extracted from the message and is used to query the database for information on the items purchased by the customer.

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Amazon的合作项目中的用户可以将他们的合作者ID放在tag参数中，有可能赚取与查询有关的购买的介绍费。

Users in Amazon's Associates program can place their Associates ID in the tag parameter, potentially earning referral fees for purchases made in connection with the query.

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