高年级学生可以竞选成为级长，帮助老师维持课堂纪律。

Senior students can run for ___prefects to help teachers maintain classroom discipline.

这位罗马行政长官负责管理城市的法律事务。

The Roman ___prefect was responsible for overseeing the city's legal affairs.

这位地方行政长官负责监督该地区的公共事务。

The regional ___prefect oversees public affairs in this area.