William had worked hard to pass the exams to enter high school. When the term began, however, his father told him that there was no money to pay for his school fees because of the summer drought. Still, William wanted to learn.
He made the village library his school. One day, he found a book called Using Energy. On the book's cover was a picture of windmills, tall steel towers with blades (叶片) spinning like giant fans. He learned that wind—something of which his hometown had plenty—could produce electricity.
He couldn't help picturing his own windmill in mind, but collecting the parts and tools he needed would take months. In a junkyard, he dug through piles of used metal, old cars, and worn-out tractors, searching for anything that might help him construct his machine. He made four-foot-long blades from plastic pipe, which he melted over a fire, flattened out, and hardened with bamboo poles.
Earning some money, he paid a blacksmith to attach the piston (活塞) to the pedal sprocket (踏板链轮) of an old bicycle frame. This would be the axle (轮轴) of the windmill. When the wind blew, the spinning blades would turn the bicycle wheel and spin a small dynamo (发电机), donated by his friend.
When he had collected all the parts, William began putting them together. He fixed the blades to the tractor fan he found, using washers (垫圈) he'd made from bottle caps. Next he pushed the fan onto the piston joint to the bicycle frame. With the help of his two best friends, William built a 16-foot-tall tower from trunks of trees and lifted the ninety-pound windmill to the top.
The big moments eventually came. He climbed up the tower and connected two wires that held a small bulb. As the wind whipped around him, the blades began to turn, slowly at first, then faster and faster. The light bulb flickered (闪烁), then flashed to life. The crowd cheered from below. "Wachitabwina (well done)!"
William's machine now powered his house. And the story of the boy who'd built a power-generating windmill to rescue his family from the drought spread across the Internet.
