非言语符号是交流中必不可少的，而体势语是非言语交际的重要组成部分。
Non-verbal symbols are essential to communication, and body language is an important component in non-verbal communication.
本文作者认为非言语交流手段中身势体语和副语言对口译过程的作用较为明显，其他两类相对而言影响较小，因此本文集中讨论身势体语和副语言两大类。
This paper focuses on kinesic behavior and paralanguage since their influence on interpretation are believed to be more conspicuous, compared with other categories of nonverbal communication.
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