adj. 落满灰尘的 (dusty的变形)

dusty \dust"y\ (d[u^]st"[y^]), a. [Compar. {Dustier}
(d[u^]st"[i^]*[~e]r); superl. {Dustiest}
(d[u^]st"[i^]*[e^]st).] [AS. dystig. See {Dust}.]
1. Filled, covered, or sprinkled with dust; clouded with
dust; as, a dusty table; a dusty attic; also, reducing to
dust.

And all our yesterdays have lighted fools
The way to dusty death. --Shak.

2. Like dust; of the color of dust; as, a dusty white.

{Dusty miller} (Bot.), a plant ({Cineraria maritima}); -- so
called because of the ashy-white coating of its leaves.