能量单位，尤指电能，等于一瓦特一小时所做的功，相当于3，' 00焦耳。
A unit of energy, especially electrical energy, equal to the work done by one watt acting for one hour and equivalent to 3, '00 joules.
同样地，作为能量和功的单位的焦耳是根据物理学家James Joule而命名的。
Likewise, the Joule, a unit of energy and work, comes from a physical called James Joule.
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