Doubler

[dʌblә]

解释:

(noun.) an electronic device that doubles the voltage or the frequency of an input signal.

昌西整理--From WordNet

解释:

(n.) One who, or that which, doubles.

(n.) An instrument for augmenting a very small quantity of electricity, so as to render it manifest by sparks or the electroscope.

整理:奥利维亚