Command line Problem: a valid backup operation was not specified on the command line.

命令行问题：命令行上没有指定有效的备份操作。

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The illustrating method via Smith Chart is one of the important tools for the design of the transmission line problem in microwave communication.

史密斯圆图图解法是通信中微波传输系统设计中的重要工具之一。

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This text carries on the research to the system of GPRS and the application provide, discussing several kinds net project based on GPRS and the method dealing with the line problem.

本文对GPRS系统以及所提供的业务进行了研究，讨论了几种基于GPRS的组网方案以及解决掉线问题的方法。

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In his book "The Color Line", he wrote that the problem of race has been part of America since its creation.

VOA: special.2009.12.27

Problem, so where are we at line 9?

那么问题是到第九行时我们在哪里？

哈佛公开课 - 计算机科学课程节选

In the famous battle of Marathon, which I will tell you about when we get there, one of its features is that because the Greeks were numerically badly inferior to the Persians, they had this problem of covering the line.

比如在著名的马拉松战役,迟些我们会讲到,马拉松战役中,希腊军队,在人数上远不敌波斯军队,这为布阵造成很大的困难

耶鲁公开课 - 古希腊历史简介课程节选

His trainer stopped the assembly line to fix the problem.

FORBES: Could Competency-Based Learning Save the Common Core?

In fixed-line telecoms, the problem is overcapacity.

ECONOMIST: How much longer can things go on getting worse?

Phone line allocation is another problem.

BBC: Net profits for African journalists