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.

youdao

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.

youdao

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.

youdao