积极的，活跃的，有生气的；迅速的，敏捷的；有效的，起作用的；
n.[语法]主动语态；积极分子，活跃的人；
同义词：active agent
the voice used to indicate that the grammatical subject of the verb is performing the action or causing the happening denoted by the verb"`The boy threw the ball' uses the active voice"
同义词：active voice
a person devoted to the active lifeadj.tending to become more severe or wider in scope"active tuberculosis"
engaged in or ready for military or naval operations"on active duty"
同义词：combat-readyfighting(a)
disposed to take action or effectuate change"a director who takes an active interest in corporate operations"; "an active antagonism"; "he was active in drawing attention to their grievances"
taking part in an activity"an active member of the club"; "he was politically active"
同义词：participating
characterized by energetic activity"an active toddler"; "active as a gazelle"; "an active man is a man of action"
exerting influence or producing a change or effect"an active ingredient"
full of activity or engaged in continuous activity"an active seaport"; "an active bond market"; "an active account"
in operation"an active tradition"
同义词：alive(p)
of the sun; characterized by a high level activity in sunspots and flares and radio emissionsexpressing that the subject of the sentence has the semantic function of actor:"Hemingway favors active constructions"
expressing action rather than a state of being; used of verbs (e.g. `to run') and participial adjectives (e.g. `running' in `running water')同义词：dynamic
(of e.g. volcanos) capable of erupting(of e.g. volcanos) erupting or liable to erupt"active volcanos"
engaged in full-time work"active duty"; "though past retirement age he is still active in his profession"
active in积极于
active role积极任务；活跃角色
active part积极的作用；能动部分，主动部分
active power有功（有效）功率
active carbon活性炭；活性炭黑
surface active表面活性的
active ingredient有效成分；活性组分
active participation主动参与；积极参加
active agent活性剂
active component活性组分；有效元件；作用分量
surface active agent表面活性剂
active service现役
active oxygen活性氧
active fault活动断裂；活性断层
active learning主动学习；积极学习
active substance活性物质；放射性物质；有效物质
active suspension主动制导悬架系统（一种由计算机控制的机动车悬架系统）
active material[核物]活性物质，放射性材料
active network有源网络
active member积极成员；活跃会员
更多收起词组短语这组词都有“积极的，活跃的”的意思，其区别是：
lively侧重支轮船快，机智，有生气。
brisk指动作敏捷、充满活力、轻快活泼地从事某项工作或活动。
active指有活动能力，强调与消极或休止相反的积极活动状态。
vigorous指不仅表现积极、有生气，而且固有精力和活力十分旺盛。
energetic提精力充沛、奋力从事某事业。