energy
/ˈenədʒɪ/noun
(pl. -ies) ［mass noun］
1
- the strength and vitality required for sustained physical or mental activity活力; 干劲：
changes in the levels of vitamins can affect energy and well-being.
维生素水平的变化会影响人的活力和安康。
1.1
energies
a person's physical and mental powers, typically as applied to a particular task or activity（花费在某项工作或活动上的）精力, 力量。
2
- power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines能。
3
- Physics the property of matter and radiation which is manifest as a capacity to perform work (such as causing motion or the interaction of molecules)【物理】能量：
a collision in which no energy is transferred.
没有能量转移的碰撞。
3.1
- count noun a degree or level of this capacity possessed by something or required by a process能级。
词源
mid 16th cent. (denoting force or vigour of expression)： from French énergie, or via late Latin from Greek energeia, from en- 'in, within' + ergon 'work'.