But it is always blank in the systematic theory and detailed study at this area.

但是，对于导纳谱总是缺少系统的理论阐述和详细的研究。

youdao

But it is always blank in the systematic theory and detailed study at this area.

但是，对于导纳谱总是缺少系统的理论阐述和详细的研究。

youdao