crumb7 /krʌm/ n. ［c］ 碎屑，面包屑：a few crumbs of bread一些面包屑 Sweep up the crumbs, please.请把面包屑擦掉。

 crumble6 /ˈkrʌmbl/ vt. & vi.弄碎；崩溃；破碎；灭亡：crumble one’s bread将面包弄碎；a crumbling church快要倒塌的教堂All her hopes crumbled to nothing.她的一切希望都已成了泡影。