as is generally known ; as everyone knows ; as is well known
如所周知，任意右乘法模是拓扑模。
It is well known that any right multiplication module is top.
youdao
如所周知，研究此类差异问题常用的方法是对偶方法。
The duality method is used usually in the study of the optimal problem.
应用推荐
模块上移
模块下移
不移动