Fish breeders depend on a continuous supply of electric power to aerate their ponds. 2. Factories need tremendous amounts of power to keep running. 3. Power lines now stretch across the countryside.

• 图1：电动打水机制造水流的效果，使池中鱼得以呼吸更多的氧气。图2：工厂需耗用大量电力，图为纺织工厂以电推动机器生产的情形。图3：农村电气化后，乡间常见杆杆相连的电线自田间穿过，输送给各农家使用。