在油漆天花板之前，先得用灰泥把裂缝填塞起来。
The cracks in the ceiling have to be plastered up before you can start painting.
石膏灰泥板，灰胶纸柏板由石膏灰泥作芯板结合几层纤维板或纸浆板制成的硬板，在建筑中用于代替灰泥或木板来建造墙壁
A rigid board made of layers of fiberboard or paper bonded to a gypsum plaster core, used instead of plaster or wood panels in construction to form walls.
灰泥已经开始从墙上脱落。
The plaster had started to come away from the wall.
