如果出现临时系统错误、网络故障或服务不可用，准备调用过程中使用的数据将丢失。
If temporary system errors, network failures, or service unavailability occur, the data used in preparation of the call is lost.
创建所需的网络监听套接字，注册在执行期间要调用的事件，然后启动主事件循环，让libev处理过程的其余部分。
You create the necessary network listening sockets, register the events to be called during execution, and then start the main event loop with the libev handling the rest of the process.
请注意，在调用网络accept函数的过程中停止了跟踪操作。
Notice that the trace has stopped in the middle of a call to the network accept function.
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