An unbalanced line is generally a single-conductor shielded cable with the center conductor carrying the signal and the shield at ground potential.

对于非平衡式信号线来说，就是一根被屏蔽了的信号线，这个中心信号线传输信号，且相对于地电势。

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I bought a "bargain" computer cable that did not connect the DB connector's mechanical ground shell to the cable's shield.

我买了一根廉价的计算机电缆，就是没有把DB连接器的外壳接电缆的屏蔽层。

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