On a blocking connection, a return of 0 means that the connection was closed, while -1 indicates that an error occurred.
在受阻塞的连接中，该函数返回0，表示连接已经关闭，而-1 则表示连接出现错误。
On a non-blocking connection, a return of 0 means no data was available, and -1 indicates an error.
在非阻塞连接的情况下，返回0表示没有可以获得的数据，返回-1 表示连接出错。
The error status of the function is captured and tested, but this example ignores a feature of send in non-blocking mode (enabled by the MSG_DONTWAIT flag).
函数的错误状态被捕获并测试，但这个例子忽略了send在无阻塞模式(由msg_dontwait标志启用)下的一个特性。
Error, notification (alert), and confirmation messages are blocking bulletin dialogs. As we shall see, even these can and should be avoided in most circumstances.
错误、通知(警告)和确认消息都是阻塞型公告对话框，我们将看到在大多数情况下就算是这些也都能够避免，并且应该避免。
Error, notification (alert), and confirmation messages are blocking bulletin dialogs. As we shall see, even these can and should be avoided in most circumstances.
错误、通知(警告)和确认消息都是阻塞型公告对话框，我们将看到在大多数情况下就算是这些也都能够避免，并且应该避免。
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