学校注册办公室的工作人员正在更新学生档案。

The ___registrars are updating student records in the school's office.

公司的注册官负责更新员工名单。

The company's ___registrars are responsible for updating the staff list.

这位年轻医生刚成为一名外科专科培训医生。

The young doctor just became a surgical ___registrar.