作为研讨会的主持人，他负责协调所有与会者的时间和安排场地。

As the ___convenor of the workshop, he was in charge of coordinating all participants' schedules and arranging the venue.

作为会议召集人，她负责安排每月一次的部门例会。

As the ___convenor, she is responsible for organizing monthly departmental meetings.

张教授被任命为今年研究生课程的召集人。

Professor Zhang was appointed as the ___convenor for this year's postgraduate course.