这种粉状灰尘让墙壁看起来苍白且粉扑扑的。

The ___chalky dust made the walls look pale and powdery.

这座老房子的墙壁呈现出一种灰白的颜色。

The walls of this old house have a ___chalky appearance.

粉笔留下的白垩痕迹摸起来干燥且呈粉末状。

The ___chalky marks left by the chalk feel dry and powdery.