surface-active material

Place the material on a flat surface, shiny side uppermost.

把材料放在平面上，有光的一面朝上。

Normal bioactive glass is a kind of solid, non-porous material with small specific surface area, which is unfavorable for the growth of osseous tissue and blood vessel.

而常用的生物玻璃密实无孔、比表面积小，不利于骨组织和血管长入。

Glass is a kind of high-strength inorganic non-metallic material, but because of the micro-crack in the surface, glass actual strength is less one-percent of its theoretical strength.

玻璃本身是一种高强度材料，由于受表面微裂纹的影响，玻璃的实际强度仅仅是其理论强度的几百分之一。

Basic theory of surface modification about glassy cement material is presented in this paper. At the same time modified glassy cement materials were manufactured by means of point activation and disperse& grind aid according to technology of mechanical-chemistry.

阐述了玻璃态胶凝材料表面改性的基本原理，并采用机械化学方法对玻璃态物质进行了点活化及助磨分散表面改性，制备了改性玻璃态胶凝材料。

SINK: Surface discontinuity, depression or dimple caused by non-uniform material shrinkage.

凹槽: 由材料收缩不一致引起的表面中断,下陷,凹洞.