每位客人只可购买一对，重复下单会被取消。
Only one pair per customer. Multiple orders will be cancelled.
客户这个选项里面你可以查看交易，退款状态，和重复下单的取消订单。
With the Customers section you can lookup transactions, perform refunds and recurring billing cancellation.
在厂房中，机器人已经开始进行产品装配和打包的重复工作，而在食品服务业，一些餐厅正在测试自助下单，甚至采用机器人侍者。
Robots on factory floors already do repetitive rote tasks such as product assembly and packaging, while in food service, some restaurants are testing self-service ordering or even robotic servers.
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