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Practice Speaking: Read Aloud
ID: #51783
Long Hydropower
Hydropower is one of the renewable energies. In past, hydropower was used for simple purposes by building water wheel on watercourse and using it to drive a mill or machine. Today this is how it works: the kinetic energy of flowing water is converted into the mechanicalenergy of turbine, which is converted into electrical energy, or electricity for short generator.
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