I think it was written by the principal
校长───principal;我───I
A country's principal resource is its brainpower.───一个国家的首要资源是其人才资源。
The principal reason for this omission is lack of time.───跳过它的主要原因是时间不足。
He was one of the principal architects of the revolution.───他是那次革命的主要发动者之一。
Stoppard had to recast four of the principal roles.───斯托帕德只好更换4个主要角色的人选。
A group of students asked to see the principal.───一批学生要求见校长.
The post of principal of the theatre school became vacant and he leapt at the chance.───戏剧学校校长一职出缺，他马上抓住了这个机会。
The principal castigate the student who have insult their teacher.───校长谴责对老师不敬的学生.
There is a shortage of principal.───资金有些短缺.
Independence Day is one of America's principal legal holidays.
The principal papers talked up his latest novel.
The college principal promised to look into the matter.
Iraq's principal export is oil.
The principal is a very busy woman.