agent
/ˈeɪdʒənt/noun
1
- a person who acts on behalf of another, in particular代理人, 尤指：
1.1
- a person who manages business, financial, or contractual matters for an actor, performer, or writer经纪人。
1.2
- a person or company that provides a particular service, typically one that involves organizing transactions between two other parties中介, 代理商：
a travel agent
旅行社
shipping agents
船运代理商
a letting agent.
出租中介。
1.3
- a person who obtains information for a government or other official body, typically in secret间谍, 特工（人员）：
a trained intelligence agent
受过训练的情报特工
KGB agents
克格勃间谍
an FBI agent.
美国联邦调查局特工人员。
2
- a person or thing that takes an active role or produces a specified effect起积极作用（或产生特定效果）的人（或物）; 作用因素：
agents of environmental change
环境变化因素
bleaching agents.
漂白因子。
2.1
- Grammar the doer of an action, typically expressed as the subject of an active verb or in a by phrase with a passive verb【语法】施动者。
2.2
- Computing an independently operating Internet program, typically one set up to locate information on a specified subject and deliver it on a regular basis【计算机】代理人程序。
派生词
agentive
adjective （ Grammar 【语法】）词源
late Middle English （in the sense 'someone or something that produces an effect'）： from Latin agent- 'doing'， from agere.