非言语行为作为一种交流方式存在于人们的生活中,包括面部表情、身体行为、声音、说话方式以及其他生理变化。侦查活动中,侦查员可以通过识别案件相关人员的非言语行为来识别他们是否说谎,利用非言语行为来为侦查工作服务。 Nonverbal behavior exists as a means of communication in people’s lives, including facial expressions, physical behaviors, sounds, ways of speaking, and other physical changes. During the investigation, investigators can identify whether they lie or not by identifying the nonverbal behaviors of the persons involved in the case and use nonverbal behaviors to serve the investigation.