monitor

/ˈmɑnətər/

someone who supervises (an examination)

中文释义：监考人；监督员

The exam monitor reminded students to turn off their mobile phones before the test began.

监考人提醒学生在考试开始前关闭手机。

A health monitor was assigned to check the patients' vital signs every hour.

一名健康监测员被指派每小时检查患者的生命体征。