registrar|registrar's

医院的登记员负责管理病人的档案。

The hospital ___registrar is responsible for managing patient records.

你需要通过域名注册商购买一个.com域名。

You need to buy a .com domain through a ___registrar.

你需要向教务处提交成绩单以更新你的学术记录。

You need to submit your transcript to the ___registrar to update your academic records.