comm是什么简称

　　The newsletter is a useful channel of communication between teacher and students.

　　发简讯是沟通师生的有益渠道。

　　Role-play is helpful in developing communication skills.

　　角色扮演有助于提高沟通技巧。

　　Culture plays a large part in non-verbal communication

　　文化在非语言交流中起着很大的作用。

　　Some sign languages are very sophisticated means of communication.

　　有些手语可以表达非常复杂的内容。

　　Their communication systems are inefficient in the extreme.

　　他们的通讯系统效率非常差。