like alternating current
比如交流电
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Alternating current causes two plates to attract or repel each other, sucking air in or blowing air out like as a tiny bellows would -- one that resonates at over 100Hz.
ENGADGET: GE uses dual piezo jets to keep a Core i7 laptop cool, play a merry tune (hands-on video)
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