Positional Mobility

可移位性

A term often used in grammar to refer to a defining property of the word, seen as a grammatical unit. The criterion states that the constituent elements of complex words are not capable of rearrangement (e.g. unsuccessful cannot vary to produce full-un-success, etc.), thus contrasting with the way words themselves are mobile in sentences, i.e. they can occur in many contrasting positions.

语法常用来指词作为一种语法单位的定义特性。按这条标准，复杂词的组构成分不能重新配列（例如unsuccessful“不成功的”不能变换成full-un-success等），因而与可在句子内移位的独立的词不同，即词可在许多对立位置上出现。