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一度电,在一般人的眼里微不足道,但节约一度电可让25W灯泡点亮40个小时、家用电冰箱运转36个小时、普通电扇连
Once the electricity, in the eyes of ordinary people insignificant, but once the electricity can make 25W light bulb lit 40 hours, home refrigerator operation 36 hours, ordinary fan with