The word in a construction that has the same grammatical function as the construction as a whole and that determines relationships of concord to other parts of the construction or sentence in which the construction occurs

• 中心词，在某结构中和这种结构作为一个整体来看具有相同的语法功能，并决定这种结构其它部分或这种结构所在句子之间和谐一致关系的词