求翻译：北大教授王叙良因病不能来我校,来校日期改为3月25日上午9点地点1号教学楼大厅，中学师生必须出席，小学生欢迎参加。是什么意思？

Peking University professor Wang classification of benign illness can come to my school to school dates to at 9:00 on March 25th place on the 1st floor lobby of teaching, students must attend school, primary school students welcome.

正在翻译，请等待...

Because Beijing University Professor Wang Xu good sickness cannot come my school, comes the school date to change in March on 25 9 o'clock place 1 classroom building hall, the middle school teacher and student must attend in the morning, the elementary student welcome to participate.

Beijing University Professor Wang Xuliang by illness to our school, the school teaching building Hall dates to March 25 locations, 1th, secondary school teachers and students must be present, primary school students welcome.

Beijing University Professor Wang Xuliang by illness to our school, the school teaching building Hall dates to March 25 locations, 1th, secondary school teachers and students must be present, primary school students welcome.