例如，法国兰斯潮汐电站已经运转了50多年，每年发电约54万太瓦时。
For example, the Rance Tidal Power Station in France has been there for over 50 years, producing around 540, 000TWh of electricity each year.
如今，能源储存是价值330亿美元的全球化产业，每年产生近1000亿瓦时的电力。
Today, energy storage is a $33 billion global industry that generates nearly 100 gigawatt-hours of electricity per year.
转动轮子只需要1.5千瓦时（5.4兆焦耳）的能量，这与使用8壶家用小水壶的能量大致相同。
It takes just 1.5 kilowatt-hours (5.4 M J) energy to rotate the Wheel -roughly the same as boiling eight small domestic kettles of water.
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