agent

the semantic role of the animate entity that instigates or causes the happening denoted by the verb in the clause

引起或引起从句中动词所表示的发生的有生气的实体的语义角色

agentive role

an active and efficient cause

积极有效的事业

capable of producing a certain effect

能够产生需要效果的

their research uncovered new disease agents

他们的研究发现了新的疾病因素

a businessman who buys or sells for another in exchange for a commission

为换取佣金而买卖他人的商人

factor

broker

a representative who acts on behalf of other persons or organizations

代表其他人或组织行事的代表

any agent or representative of a federal agency or bureau

联邦机构或局的任何代理人或代表

federal agent

a substance that exerts some force or effect

施加某种力量或效果的物质