grayish

Grayish white powder or pellets and important inorganic salt products,4A zeolite is crystal lagoriolite.

4A沸石是一种晶体状硅铝酸钠,化学组成式:Na2O.

The necrotic epithelium becomes embedded in exuding fibrin and red and white cells，so that a grayish pseudomembrane is formed-commonly over the tonsils，pharynx or larynx.

坏死细胞被纤维蛋白、红细胞和白细胞凝聚在一起形成灰白色假膜，通常覆盖在扁桃腺、咽或喉。