翻译英文 1.课堂上，在别人讲话时说话是不礼貌的。2.在别人发言时，插嘴是不礼貌的

1, in class, it is impolite to sepak while others are talking.
2. it is not polite to interrupt others when they are speaking.
3. it is not polite to see others at your backside.
4. it is bad habit to chat with others in class.

如果是自我介绍就不是很礼貌！！
但是也可以这么想~~他说hello就意在给你打招呼！！
你回应一下并没什么不好！！反而会让别人觉得你很容易亲近的啦

3.Back class is discourteous.
4. class and others is a bad habit of chatting.

这是用翻译器在线翻译的，不知道可不可以？？？

您好!

1. in classroom, when others speech speaks not politeness.
2. when others speech, interrupts not politeness.
3. attends class when turns head not politeness.
4 attend class with others chats badly is familiar with

不知道您能否满意?