energy：释义

The capacity for work or vigorous activity; vigor; power. See Synonyms at strength.

Exertion of vigor or power: a project requiring a great deal of time and energy.

Vitality and intensity of expression: a speech delivered with energy and emotion.

Usable heat or power: Each year Americans consume a high percentage of the world's energy.

A source of usable power, such as petroleum or coal.

Physics The capacity of a physical system to do work.