求翻译：上学要穿戴整齐；上课不迟到、不早退；课堂上不能使用手机；保持校园清洁；走路靠右行，诺要骑自行车上学，自行车一律放在第五楼教学楼左边的操场上。是什么意思？

To go to school dressed; not to be late for class, does not leave early; cannot use mobile phones in the classroom, and keeping the campus clean in walking on the right lines, promise to go to school by bike, bikes will be placed on the fifth floor classroom building on the left side of the playground.