bivariant system是什么意思

用法例句

In this paper,we show the significant of the new mathematics theory of two variables system ([3]) and some main concept on the classification of the new mathematics theory of two variables system.

本文叙述了双变量系统新数学理论（［３］） 的意义和双变量系统新数学理论分支的一些主要概念。