大众传播的显著特点之一是单向性强，反馈机制弱。

One of the obvious characteristics of public communication is strong unidirectivity and weak feedback mechanism.

本文对“句内后照应单向性”论点的有效性提出质疑。

This paper questions the validity of the claim that intra-sentential cataphoric reference is unidirectional.

本文对“句内后照应单向性”这一论点的有效性提出质疑。

This paper questions the validity of the claim that "intra-sentential cataphoric reference is unidirectional".

进化性转化具有单向性和恒久性特点，它只由后置修饰语向前置修饰语转化，其结果是产生固化次范畴；

The evolutional transformation between the two is unidirectional and permanent. It involves only the transformation from the postmodifier to the premodifier and results in frozen subcategories.