active
/ˈæktɪv; `æktɪv/ adj
1
(a) (in the habit of) doing things; energetic （惯於）做事的; 精力旺盛的; 积极的; 活跃的
Although he's quite old he's still very active. 他虽然老了, 可仍闲不住.
lead an active life, ie one full of activity 过著活跃的生活
She takes an active part (ie is energetically involved) in local politics. 她积极参加本地的政治活动.
(b) quick; lively 迅速的; 活跃的
have an active brain 头脑灵活.
2 functioning; in operation 起作用的; 操作中的
an active volcano, ie one that erupts occasionally 活火山.
3 having an effect; not merely passive 有效的; 主动的
the active ingredients 有效成分
active resistance 积极抵抗.
4 radioactive 放射性的.
5 (grammar) of the form of a verb whose grammatical subject is the person or thing that performs the action, as in He was driving the car and The children ate the cake 主动语态的（动词的一种形态, 其语法上的主语为施动的人或物, 如 He was driving the car及The children ate the cake等句）. Cf 参看 passive. active, n [sing]
(also active voice) (grammar) active(5) forms of a verb 动词的主动语态形式
In the sentence `She cleaned the car' the verb is in the active. 在She cleaned the car句中, 动词是主动式. Cf 参看 passive voice (passive).