PHn.[化]酸碱度(=Potential Of Hydrogen)abbr.公共卫生(=Public Health)abbr.紫心勋章(=Purple Heart)phlysis小水疱

1. The segment of the boundary above the water table and below the phreatic surface is called the seepage face.
   水面以上和潜水面以下的一段边界叫做渗出面。