The diagram shows how electricity is generated in a hydroelectric power station.  Summarize the information by selecting and reporting the main features, and make comparisons where relevant.
The diagram shows how electricity is generated in a hydroelectric power station.  lbww
The flow chart shows the process of electricity being generated in a hydroelectric power station, and the ways to produce electricity from water are complex. At the first stage, the river is led to a high-level reservoir blocked by a dam. Under the dam, there is an intake, which uses the flow of water to produce electricity in the daytime and pump at night. After that, the water flows into the power station through a tube, and passes through reversible turbines. In the morning, water pushes ahead the turbines in order to operate generators. After this step, the generator helps to deliver electricity through the power lines to the National grid. Hence, in the evening, water which is stored in the low-level reservoir is pumped in the opposite direction and goes back into the high-level reservoir. Finally, the water will do this process again and again. In all, electricity production from water is rotating and recycled. 
The flow chart  
shows
 the process of  
electricity
  being generated
 in a hydroelectric power station, and the ways to produce  
electricity
 from  
water
 are complex. At the  
first
 stage, the river  
is led
 to a high-level reservoir blocked by a dam. Under the dam, there is an intake, which  
uses
 the flow of  
water
 to produce  
electricity
 in the daytime and pump at night. After that, the  
water
 flows into the power station through a tube, and passes through reversible turbines. In the morning,  
water
 pushes ahead the turbines in order to operate generators. After this step, the generator  
helps
 to deliver  
electricity
 through the power lines to the National grid.  
Hence
, in the evening,  
water
 which  
is stored
 in the low-level reservoir  
is pumped
 in the opposite direction and goes back into the high-level reservoir.  
Finally
, the  
water
 will do this process again and again. In all,  
electricity
 production from  
water
 is rotating and recycled.