In scientific discussions it is essential to guard against subjectivism and arbitrariness.

在科学论中要严防主观武断。

This paper argues that both arbitrariness and motivation are Lansign's basic characteristics and that they are a unity of opposites in Lansign's every aspect and category.

其实，任意性和理据性都是语号基本特征，二者有机地对立统一于语号各个层面和范畴。