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Solar Panels on Rooftops
屋顶上的太阳能板
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Solar panels sit on rooftops to catch sunlight.太阳能板安装在屋顶上，用于吸收阳光。
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They change sunlight into clean electric power.它们将阳光转化为清洁的电能。
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Each panel has many small solar cells.每块面板都包含许多小型太阳能电池。
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Sunlight makes electrons move and create current.阳光使电子移动，从而产生电流。
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Wires carry this power to your home outlets.电线将这种电能输送到家庭插座。
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Extra power can go back to the grid.多余的电能可输送回电网。
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Panels work even on cloudy days.阴天时面板也能工作。
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This is renewable energy in action.这就是可再生能源的实际应用。