taking the same line of argument further
乃至，甚至于
the study shows how television and, by extension, the media, alter political relationships.这项研究表明电视，乃至媒体是如何改变政治关系的。
the study shows how television and, by extension, the media, alter political relationships.
这项研究表明电视，乃至媒体是如何改变政治关系的。