If no echo reply is received, then one or more of the conditions described above hasn't been met and the ping fails (see Listing 2).
如果没有收到回显回复，就说明不满足上述一个或多个条件，ping失败了(见清单2)。
The output from a successful ping can also be useful in helping to determine network latency, as it reports on the time taken to receive the echo reply.
成功的ping的输出还有助于判断网络延迟，因为它会报告收到回显回复花费的时间。
The echo process will consist of two primitive tasks — receiving a message via the receive activity and replying to the sender via a reply activity.
回送流程将包括两个基本任务—通过receive活动接收一条消息以及通过reply活动向发送方作出应答。
The echo process will consist of two primitive tasks — receiving a message via the receive activity and replying to the sender via a reply activity.
回送流程将包括两个基本任务—通过receive活动接收一条消息以及通过reply活动向发送方作出应答。
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