It is the duty of every citizen to honor the national flag. Why? Because the national flag is the symbol of a (the) country. To respect it means to respect the country. In other words, if a man loves his country, he must love the national flag.
尊敬国旗是每个公民的责任（义务）。为什么？因为国旗是国家的象征。尊敬它意思就是尊敬国家。换句话说，如果一个人爱国，他必须爱国旗。
In school, the national flag is usually raised at a certain time every day. Then the principal, teachers, staff and students are to (must) stand before it and sing the national anthem. It is indeed extremely meaningful to attend such a ceremony.
在学校里，通常每天定时要升旗。那时，校长，老师，教职员学生教师将恭敬地站在它前面并且唱国歌。参加此项仪式确实非常有意义。