当你在等待复印文件或等待传真确认信号时，你可以做一些伸展或蹲起运动。
When you are waiting for the copy machine to spit out all your pages or the fax machine to give you the "sent" conformation, do some stretches and squats.
服务器会返回一个同意断开连接的确认信号，然后客户端和服务器都将断开连接。
The server replies with an acknowledgement of the disconnect request, and then both the client and server disconnect.
英国探寻火星生命计划遭遇第二次失败，太空探测器再次没能发出成功登陆的确认信号。
A British mission trying to find life on Mars suffered a second setback when its space probe again failed to send a signal to confirm it had landed.
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