For example, booking would be an entity for booking for a hotel room, but there are different types of bookings: advance; immediate; priority; and so on.
例如，预订将是用于预订一个酒店房间的一个实体，但是有三种不同的预订类型：预付款，直接预订，优先预订，等等。
Because he cannot continue filling out that booking form, and needs to start the booking process for the higher priority customer, he wants to be able to continue with the previous one later.
因为他不能继续填写该预订表单，并且需要为具有较高优先级的客户启动预订过程，所以他希望稍后继续处理原来的预订表单。
Then, suppose a customer walks into the agency where Bob is working and requests another booking; that customer's request is temporarily a higher priority.
然后，假设一个客户来到Bob工作的旅行社，并进行另一个预订请求；这时，该客户的请求具有更高的优先级。
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