a.  忙碌的；好动的，活跃的 ≠ nactive

a.  积极的

a.  起作用的

• actively 

  ad.  积极地；活跃地

• activity

  n.  〔尤指为达到一定目的而进行的〕活动

  n.  活跃，热闹；活动

• activist

  n.  积极分子；活动家

• active life/lifestyle  忙忙碌碌的生活

• active mind/imagination  想象力很丰富

• be active in (doing) sth  积极做某事

• ake part in an activity  参加活动

• physical activity  体育活动

• after-class activities  课下活动

• brain activity  大脑活动

• cognitive activities  认知活动

• engage in activities  参与活动

• social activities  社交活动

• My father always led a very active life.

  我父亲一直过着忙忙碌碌的生活。

• We’re taking active steps to deal with the problem.

  我们正在采取积极措施解决这个问题。

• The virus is active even at low temperatures. 这种病毒即使在低温下也有活性。

• The farm was always a hive of activity at this time of year.

  每年这个时候农场里都是一派繁忙景象。

• The study shows that those living the longest are more outgoing, more active and less neurotic (神经质的) than other people. 更为活跃

• Are you actively preserving the present, or selectively forgetting the past, or boldly creating the future? 积极地珍惜当下

• It can keep the mind active, prevent getting bored and help to concentrate.

BrE /ˈæktɪv/

NAmE /ˈæktɪv/