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Can You Repair This?

 

There was a boy who was good at math.

He was famous for handling machines.

The boy became a young man. One day，a professor came to see him.

“Can you repair this engine?" the professor asked. “Yes， of course，" he answered.

While he was repairing the engine，he found out

its energy efficiency was very low. He transformed it and invented the steam engine. The steam engine was a big hit. The young man was  James Watt.

 

 

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