Someone who invigilates an examination supervises the people who are taking it in order to ensure that it starts and finishes at the correct time, and that there is no cheating.
例句
I've taught sixth formers and invigilated exams.我教过六年级学生并监考。
英汉词典释义
vt. & vi.
监考
He wrote this whilst invigilating a biology examination.这是他在生物考试考场监考时写的。
英英词典释义
Verb
1. as of students taking an exam, to prevent cheating