active本身作形容词。
active：adj.(尤指体力上)忙碌的，活跃的；积极的；
actively：adv.积极地;；活跃地；主动地
Although he's nearly 80, he is still very active.
尽管快80岁了，他还是十分活跃。
She plays an active part in local politics.
她积极参与地方政治活动。
They took active steps to prevent the spread of the disease.
他们采取积极措施，防止疾病蔓延。
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