候补客户英语怎么说

候补客户的英文翻译是 stand-by customer。

这个短语来源于客户排队等待服务时，等候服务的客户可以被称为候补客户。

下面是一些英文例句和中文翻译：

The restaurant only allows reservations for stand-by customers during peak hours. (餐厅在高峰时段只接受候补客户的预定。)
The airline offers a stand-by option for passengers who are willing to take a later flight. (航空公司为愿意晚点飞行的乘客提供候补选项。)
The stand-by line at the ticket office is usually much shorter than the regular line. (售票处的候补队列通常比常规队列短得多。)