showing or involving great activity or vitality 精力充沛的,充满活力的;需要精力的 moderately energetic exercise. 适度的体能锻炼。 ■(Physics)characterized by a high level of energy (in the technical sense) (物理)高能的 energetic X-rays. 高能X射线。 ■of or relating to energy (in the technical sense) (与)能量(有关)的
派生 energetically adverb 语源
mid 17th cent. (in the sense 'powerfully effective'): from Greek energētikos, from energein 'operate, work in or upon' (based on ergon 'work')