只有当每个被等值的子系统的内部严格地同调时，原系统的动态特征才能被保全在等值系统中。

Only if each sub-system to be reduced keeps coherent inside respectively, dynamic characteristics of original system can then be rigorously preserved.

youdao

只有当每个被等值的子系统的内部严格地同调时，原系统的动态特征才能被保全在等值系统中。

Only if each sub-system to be reduced keeps coherent inside respectively, dynamic characteristics of original system can then be rigorously preserved.

youdao