prefect
n
1 (esp Brit) any of a group of older pupils in a school who have authority over younger pupils and certain responsibilities for discipline, etc 学生长(中学的校级负有管理或维持纪律等责任的年长的学生).
2 (also Prefect)
(a) (title of the) chief administrative officer of an area in certain countries, eg France and Japan 某些国家中的地区最高行政长官(如法国的省长和日本的县长)或其官衔.
(b) head of the Paris police 巴黎警察局的局长.