crumbling

She brushed the crumblings off the table into her hand.

用法提示：crumblings 是名词的复数形式，指从食物或物体上掉落的碎屑。

The crumbling left at the bottom of the bag was too small to eat.

用法提示：此处 crumbling 作名词，表示剩下的碎裂物，句中是单数用法。

Sparrows pecked at the crumblings of bread on the path.

用法提示：crumblings 为名词复数，指散落在地上的面包碎屑。