SM

例句：

1. 1. 身体语言，非言语交流2. 社会媒体
   Social Media
2. 3. 缩略语
   如：SMS, SMS, SMILE, SMOKING, SMART等
3. 1. The teacher used body language to communicate with the students effectively.
   老师通过肢体语言有效地与学生沟通。
4. 2. Social media has become an important tool for communication and information sharing.
   社交媒体已成为沟通和信息分享的重要工具。
5. 3. The company's SMART policy is aimed at improving employee productivity.
   公司的SMART政策旨在提高员工生产力。