Energy: The conservation of energy must be satisfied(p 足) in all the processes(过程) in the nature.The different types of physical 'motions'are transformed(+t 化) through the important link of energy(纽带)Energy：The conservation of energy must be satisfied（满 足） in all the processes（过程） in the nature. The different types of physical ‘motions’ are transformed（转 化） through the important link of Energy(纽带）