20 词条主页 > 词条 > 拉丁美洲西班牙语 (XL) > hertz (Hz)
hertz (Hz)
Unit used to measure frequency of alteration of current or voltage
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Floyd Mayweather
Born Floyd Sinclair on February 24, 1977, an American professional boxer. He is a five-division world champion, where he won nine world titles in five ...
