The coordinate phrases formed with words from different parts of speech are a kind of atypical coordinate phrases and are of substantive nature. This paper mainly examines the maintenance of balance in such phrases. This study shows that syntactic and semantic complementarity is the key factor for the balance in this kind of phrases and is actually the basis for the formation of such phrases. The method used in this study is to find out the rules and problems by a statistical analysis of data from typical and atypical coordinate phr...