名词
中文翻译：交替电流声
同义词：
['A.C. hum', 'alternatingcurrent humming']
例句：
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1.The A.C. hum is soloud that it can be heard from amile away.
A.C.的嗡嗡声如此响亮，以至于从一英里外都能听到。
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2. The A.C.hum was so annoying that I couldn't concentrate on my work.
A.C.的嗡嗡声如此令人烦恼，以至于我无法集中注意力工作。
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3. The A.C. hum was so loud thatit drowned out the sound of thetraffic.
A.C.的嗡嗡声如此响亮，以至于它淹没了交通的声音。