The wildfire burned down the entire forest.

This wood burns easily.

This power plant generates a large amount of electricity every day.

In this area, electricity is generated by wind power.

We decided to install a personal electricity generation system.

This wind power plant generates enough electricity in a day.

He wound the spring of the clock.

His dog started to go into heat yesterday.

His dog has entered the mating season.

He is studying the behavior of animals when they enter the mating season.