(1)双重代理；双方代理
代理人同时代理相互间存在利益冲突的双方当事人进行同一项交易活动的行为。

(2)双重间谍
同时为两个敌对国家或市场竞争者服务的间谍行为。

• direct ascending line
• direct attack
• direct confession
• direct contempt
• directed verdict
• direct estoppel
• direct evidence
• direct examination
• direct financing
• direct injury
• direct interest
• direction
• directive to physicians
• direct line
• direct loss
• directly essential to production
• Direct of Public Prosecutions
• director
• Director of Public Prosecutions/D.P.P.
• directors' and officers' (D & O) liability insurance
• directory
• direct payment
• direct placement
• direct selling
• direct tax