第二个是可在数亿分之一秒的时间里实现数千伏电压的通断，这是一项前所未有的成就。

The second advance is a way of switching thousands of volts on and off in a few billionths of a second, a previously impossible feat.

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[color=#000000]第二个是可在数亿分之一秒的时间里实现数千伏电压的通断，这是一项前所未有的成就。

[font=Times New Roman][color=#000000]The second advance is a way of switching thousands of volts on and off in a few billionths of a second, a previously impossible feat.

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基于雪崩三极管雪崩效应，研制出了一种数千伏、纳秒级脉冲源。

Based on the avalanche effect, a kind of kilo-volt nanosecond pulsers has been designed, by using microwave PCB (printed circuit board).

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