a rush of electrical current
... on one’s first attempt 第一次尝试 a rush of electrical current 急促的（电流） catch a glimpse of 瞥见； glance at 看一眼 ...
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a rush of electrical current
电流的冲击
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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But the central point about both taps and transistors is that they allow a small signal the twist of a hand or the increase of a voltage to control a much larger one the rush of water or of electrical current.
ECONOMIST: The middle age of the transistor