agent
noun
a person who acts on behalf of another, in particular
代理人，尤指
■a person who manages business, financial, or contractual matters for an actor, performer, or writer
经纪人
■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.
各运货代理商。
a letting agent.
出租中介。
■a person who obtains information for a government or other official body, typically in secret
间谍
a trained intelligence agent.
受过训练的情报人员。
KGB agents.
克格勃间谍。
an FBI agent.
美国联邦调查局谍报人员。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。
■(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
■(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agentive
adjective
(Grammar)(语法)语源late Middle English (in the sense 'someone or something that produces an effect'): from Latin agent- 'doing', from agere