A nation has its rules and a family also has one!
国有国法，家有家规!
A bargain is a bargain.
达成的协议不可撕毁。
Dot the i's and cross the t's.
一点一划，循规蹈矩。
Every brave man is a man of his word.
每个勇敢的人都是一个言出必行的人。
Don't arrive late for class.
不能上课迟到。
Don't run in the hallways.
不能在走廊跑。
Don't fight with someone.
不能打架。
Don't listen to the music in the classroom.
不能在教室里听音乐。
Don't wear hats in the classroom.
不要在教室里戴帽子。（注：此条在提供的文档中未明确列出，但通常学校会有此类规定）
Students are expected to abide by the school rules and regulations.
学生应遵守学校的规章制度。
The school has implemented strict rules to ensure a safe and orderly learning environment.
学校实施了严格的规定，以确保一个安全有序的学习环境。
Violations of the school rules may result in disciplinary actions.
违反校规可能会受到纪律处分。
这些谚语和建议有助于学生和学校管理人员更好地理解和遵守学校规则，从而维护良好的学习环境和秩序。