岩石渗透率具有明显的方向性，因而渗透率是矢量。

The study and practice show that permeability as a kind of vector is closely related to orientations for its scale.

youdao

岩石渗透率具有明显的方向性，因而渗透率是矢量。

The study and practice show that permeability as a kind of vector is closely related to orientations for its scale.

youdao