英语翻译High school students in America hear about twenty bells

英语翻译
High school students in America hear about twenty bells every day. The first bell is the tardy bell（上课铃）. If students are not in their seats when the tardy bell rings, they know they are late. Another bell rings at the end of each class, and everyone leaves class quickly and goes to the next one. When students are in a difficult class, they are often happy to hear the bell; but if the class is interesting, they do not want the bell to ring. Most students like the lunch bell best. They know it is time to join their friends for lunch. They buy a hot meal in the school dining-room（食堂）or they bring their lunch from home in a big paper bag.
After a nice lunch, everyone knows it is soon time for another bell, another bell…