这些事件可以是诸如计时器，信号，文件描述符上预备读取的数据，等等。
These events can be things like timers, signals, data ready for reading on a file descriptor, and so on.
清理可能包括终止会话、取消计时器、取消回调处理程序或清理可能需要的任何数据结构。
This can include invalidating sessions, canceling timers, canceling callback handlers or cleaning up any data structures that may need it.
您为这个连接启用了更低粒度的重新传输计时器，并重新发送数据包。
You enable lower granularity for the retransmission timer for this connection and resend the packet.
可以通过结合使用计时器和HTTP实现提供轻量的服务，从而自动地提供文件内容，在修改文件内容时更新返回的数据。
You can combine this with the HTTP implementation to provide a lightweight service to serve up the contents of a file, updating the data returned as the file content is modified.
为提高性能和保证数据的可靠传输，TCP使用了重传计时器的概念。
To gain higher performance and reliability, TCP uses the concept of Retransmission Timer.
为提高性能和保证数据的可靠传输，TCP使用了重传计时器的概念。
To gain higher performance and reliability, TCP uses the concept of Retransmission Timer.
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