[jīng lì]
energy; vigour; vim
be deficient in energy; anenergia
精力不足
exceptional vitality
精力过人
be full of vitality
精力旺盛
concentrate one's efforts on doing sth.
集中精力
It's remarkable that a 70-year-old man has the stamina he had!
一个70岁的人还有他那样的精力, 真是不同寻常。