주장이자

In a sentence

• 그는 팀의 지도자이자 주장이자 훌륭한 선수이다.

  He is the leader, captain, and an excellent player of the team.

  Here, '주장이자' is used to denote one of the multiple roles fulfilled by the person described, combining the word '주장' (captain) with '-이자' (a conjunctive particle indicating simultaneity).

• 이 논문의 저자는 동시에 주장이자 실행자이다.

  The author of this paper is simultaneously a proponent and executor.

  In this sentence, '주장이자' implies that the author is someone who proposes or advocates a theory while also taking actions related to it, using '-이자' to signify dual roles.

• 그 회의에서 그는 회사의 대표이자 주장이자 중재자였다.

  In the meeting, he was the company representative, captain, and mediator.

  The usage of '주장이자' here denotes that the person performed the role of a leader or captain among other responsibilities, with '-이자' connecting the roles in a descriptive list.