In the early 1960s, researchers tried firing rockets trailing wires into thunderclouds to set up an easy discharge path for the huge electric charges that these clouds generate.

在20世纪60年代早期，研究人员试图将火箭尾部的电线发射到雷云中，以便于为这些雷云产生的巨大电荷建立一个简单的放电路径。

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Depending on the polarity of the voltage source, one of the two diodes (d) in parallel is used to reduce noise while the other provides a discharge path.

根据电压源的极性，互相并联的两个二极管(D)中的一个用来减小噪声，而另一个二极管则提供放电通路。

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Depending on the polarity of the voltage source, one of the two diodes in parallel is used to reduce noise while the other provides a discharge path.

根据电压源的极性，互相并联的两个二极管中的一个用来减小噪声，而另一个二极管则提供放电通路。

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"This consent decree offers the fastest and most certain path available to EPA to stop the discharge of coal ash from the Badger into Lake Michigan, " said Susan Hedman, EPA regional administrator.

NPR: Deal Requires Ferry To Stop Ash Dumping In 2 Years