这些形容词均有“积极的，活跃的”之意。
active ：指有活动能力，强调与消极或休止相反的积极活动状态。
- Although he's nearly 80, he is still very active.
尽管快80岁了，他还是十分活跃。
energetic ：提精力充沛、奋力从事某事业。
- He knew I was energetic and dynamic and would get things done.
他知道我精力充沛、生气勃勃，会把事情办成的。
vigorous ：指不仅表现积极、有生气，而且固有精力和活力十分旺盛。
- a vigorous campaign against tax fraud
坚决打击骗税的运动 - Take vigorous exercise for several hours a week.
每周做几个小时剧烈运动。
brisk ：指动作敏捷、充满活力、轻快活泼地从事某项工作或活动。
- a brisk walk
轻盈的步履 - to set off at a brisk pace
以轻快的步伐上路
lively ：侧重指轻快，机智，有生气。
- an intelligent and lively young woman
聪慧而充满活力的年轻女士 - He showed a lively interest in politics.
他对政治表现出浓厚的兴趣。
