Most of the energy from their food is used for growing.
We have to put a lot of energy into the game.
"We've spent a lot of time and energy trying to learn how to do these things right."
They can be used to change the form of energy.
We both bring a lot of energy to the job.
He had a lot of energy and was known for working very hard.
So does a kind of natural energy on the second floor.
The green was coming to the end of its energy, he knew.
I spent most of my energy getting ready to go out and party.
I let go of the energy and opened my eyes.