n.

1. 活力，幹勁[U]
   They are working with energy.

   他們正在幹勁十足地工作。

2. 精力，能力[U][P]
   They devoted all their energies to the job.

   他們把全副精力投入這項工作。

3. 【物】能，能量[U]

n.

1. the strength and vitality required for sustained activity.
   ▸ (energies) a person's physical and mental powers as applied to a particular activity.
2. power derived from physical or chemical resources to provide light and heat or to work machines.
3. Physics  the property of matter and radiation which is manifest as a capacity to perform work.

[名]

1. ①元氣；精力。
   에너지를 소모하다.

   消耗精力。

2. ②（物理）能；能量。
   열에너지.

   熱能。