英文翻译,请把红色字体的英文句子翻译成中文.thank you
Dear students,
The following rules are for you at Cambridge school.Please read them carefully.
1..Stand up whena teacher or a visitor goes into the classroom.
2.You have to be in a classroom or study places during lesson time.
Arrive in time for the start of each lesson with the things you need so thatyou are ready to start work.
Wear smart , clean clothes.No long hair for boys.
.3.Don’t leave the school if you are not allowed.
4.You can’t takefoodand drink from the dining-room
Radios and personal computers can only beused in dormitory house where the house rules allow（允许）5.You can’t use them in class or in the library.Class 4
翻译一下句子：
1..Stand up whena teacher or a visitor goes into the classroom.
2.You have to be in a classroom or study places during lesson time
3.Don’t leave the school if you are not allowed.
4.You can’t takefoodand drink from the dining-room
5.You can’t use them in class or in the library