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TOEFL BNC: 1316 COCA: 1444
active
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adjective /ˈæktɪv/
  1. 1
    someone who is active does a lot of different activities and has a lot of energy and interests 積極的；活躍的

    People are remaining active into later life. 人們到了晚年仍很活躍。

    meditation techniques to keep the mind active and alert 保持頭腦活躍和警惕的沉思技巧

     Synonyms and related words
    Energetic and lively: energetic, lively, active...
    1. a.
      very involved in the work of an organization or with a particular activity 積極的；熱心的
      active in :

      She continues to be active in politics. 她依舊活躍於政壇。

      active member :

      He is an active member of the American Cancer Society. 他是美國癌症協會的積極分子。

       Synonyms and related words
      Busy and working: busy, active, tied up...
    2. b.
      used about a period or event that is full of busy activity （活動和時間段）劇烈的，充實的

      We had a very active weekend. 我們過了個非常充實的周末。

       Synonyms and related words
      Busy places and times and describing busy places and times: madhouse, a hive of activity, the centre of activity/things...
  2. 2
    taking positive action in order to make something happen, rather than just hoping that it will happen 在進行中的；在起作用的；切實的

    There are already active discussions going on. 討論已經在進行了。

    Active steps are being taken to calm the situation. 已經采取了切實的行動以平息局勢。

    We couldn't have organized the show without the active support and participation of the students' parents. 沒有學生家長的積極支持和參與，我們就無法組織演出。

     Synonyms and related words
    Involved in something: concerned, active, involved...
  3. 3
    operating or working in a particular area or at a particular time （在某一地區或某一時間内）活動中的

    Pickpockets are known to be active in the area. 該地區以小偷活動猖獗而著稱。

     Synonyms and related words
    Existing, happening or being dealt with now: existing, present, immediate...
    1. a.
      regularly doing a particular activity 周期性的進行（某項活動）
      sexually active (=having sex regularly) :

      sexually active young women 性活躍的年輕女性

       Synonyms and related words
      Busy and working: busy, active, tied up...
    2. b.
      an active electrical system is working （電路系統）在運轉中的

      The burglar alarm becomes active ten seconds after you set it. 防盜警報在設置後10秒鐘啓動。

       Synonyms and related words
      Electricity and electrical power: AC, active, alternating current...
  4. 4
    an active volcano is likely to erupt (=explode and pour out fire) at any time. When a volcano no longer does this, it is extinct. （火山）活的
     Synonyms and related words
    Volcanos: active, crater, dormant...
  5. 5
    chemistry producing a chemical or biological reaction 活性的

    What is the active ingredient in detergents? 洗滌劑中的活性成分是什麽？

     Synonyms and related words
    Describing chemicals and chemical processes: active, aerobic, alkaline...
  6. 6
    linguistics in active verbs or clauses, the subject is the person or thing that does or is responsible for the action of the verb. For example in the sentence ‘The crowd was making a bit of noise throughout the game', the verb group ‘was making' is active, and the clause is in the active voice. 主動語態的
     Synonyms and related words
    Describing types and forms of verbs: active, causative, ditransitive...
    See also passive

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