Not so with the nanoelectric Etch A Sketch, which can selectively erase the conducting lines it creates by applying negative voltage.

纳米电子蚀刻素描可以通过施加负电压，对画好的线路进行选择性清除。 他们的成果刊登在去年出版的《科学》杂志上。

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When the microscope's sharp tip applied a positive voltage to the material's surface, it drew conducting lines that exist in the space between the oxide layers.

当显微镜的尖端把正电压施加到材料表面时，它就在氧化层之间的空白处画出了导线。

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The major advantage with these types of switches is that the voltage drop across it during conducting and non-conducting states, is ideally zero.

主要优点是与这些类型的交换机是压降，它在开展和非导电国，是最理想的零。

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Each glass sheet has rows of conducting wires running across it, and the two sets of wires are at right angles, so that a voltage can be applied across the liquid crystal at any chosen intersection.

ECONOMIST: Just press print