participator [pɑ:'tɪsəˌpeɪtə]

例句:

• This researching can be reference for project participator in project turn - key management.
  本研究可供我国工程项目参与各方开展交钥匙承包参考.
  
• Part four is rights and duties of each Electronic Authentication Service participator.
  电子认证服务各参与人的权利义务.
  
• The whole self is the observer and the participator in the roles.
  全我是旁观者,也是角色的参与者.