单词 | watt |
释义 | watt n. the SI unit of power, equivalent to one joule per second, corresponding to the rate of energy in an electric circuit where the potential difference is one volt and the current one ampere. Usage Symb.: W. Phrases and idioms watt-hour the energy used when one watt is applied for one hour. Etymology: J. Watt, Sc. engineer d. 1819 |
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