double agent

名词 double agent:

1. a spy who works for two mutually antagonistic countries

1. Double agents live in a perpetual state of fear.
   两面派永远过着提心吊胆的生活。
2. A spy who operates from within an organization, especially a double agent operating against his or her own government from within its intelligence establishment.
   间谍一个间谍，活动于一个组织内部，尤指一个双重间谍，从其情报建立的机构内部从事反对他的或她的政府的活动