一次传输能把同一信息发送给接收机。
内部的邮件就是一次消息的传输——在这种情况下是一次不可靠的传输。
The internal mail is a message transport - an unreliable one in this instance.
传输可靠性有类似的性能问题，但是其令人感兴趣的好处是一次且仅一次传送。
Transport reliability has similar performance concerns but the interesting benefit is once-and-only-once delivery.
在本文的实现中，每传输10KB数据则更新一次进度。
In this article's implementation, progress is updated when every 10kb of data are transferred.
第一次公开演示远距离电视传输技术。
First public demonstration of long distance transmission of television.
该系统具备一次模式曲线无线传输的防护和列车自动控制的功能。
The system has the functions of primary mode profile protection and automatic train control.
该系统具备一次模式曲线无线传输的防护和列车自动控制的功能。
The system has the functions of primary mode profile protection and automatic train control.
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