这保证了客户请求按照它们被接收到的顺序执行。
This ensures that execution of client requests happens in the order they are received.
这些操作是按先后顺序运行的接收活动。
These operations are receive activities that run in sequential order.
UDP数据包可能会丢失，或者不按顺序发送给接收的应用程序；必须在应用程序层进行错误处理。
UDP Datagrams can be lost or delivered in a different order to the receiving application; the error handling must be done at the application layer as well.
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