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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The interval shield tunnel of Urban transit line 11 in Shanghai is situated closely under the group piles of the National Key Laboratory for Ocean Engineering of Shanghai Jiaotong University.

拟建的上海市轨道交通11号线区间盾构隧道近距离下穿交大海洋重点工程实验室群桩基础。

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The digging shield for the second passage of the vehicle tunnel reached the end of the 8.95-kilometer line under the Yangtze yesterday.

昨天掘进盾构到达位于长江下面的8.95公里长的第二条交通隧道通道末端。

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Well, to that end, Radiation Shield Technologies has developed a full line of radiation-defeating garments (the thyroid collar being our favorite).

ENGADGET: Demron garments resist radiation without overlooking style

Straddling a shield wire, Ti crawls along a transmission line looking for everything from high grass to low trees.

FORBES: Strong Grid: Are Radical Robotics the Secret Ingredient?

Juan wedged the Humvee right into the line of fire, using the vehicle as a shield.

WHITEHOUSE: The White House