talking head

talking-head的词性：
n.Slang （名词）【俚语】

1. The image of a person, as on a television documentary or news show, who talks at length directly to the camera and usually appears on the screen with only the head and upper part of the body visible.
发言者持续特写头像：如一部电视纪实或新闻节目中一个人的图像，此人长时间直接对准摄像机说话并且通常在屏幕上只现出其头部和身体的上部

2. The person thus televised.
在电视中被这样放映的人