例文
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- The watt second is a unit of energy, equal to the joule.
- One kilowatt hour is 3 600 000 watt seconds.
- The Stroboflash II had a constant 100 watt second light output that was not adjustable.
- It put out 200 watt seconds of light power, but could not be turned down.
- A joule is a measurement of energy or heat required to sustain one watt for one second, known as a watt second.