grain of crumb

例句：

1. 1.She ate the last piece of bread and left a grain of crumb on the plate.
   她吃了最后一片面包，在盘子上留下了一粒面包屑。
2. 2.The dog was so hungry that it started to nibble at the crumbs on the floor.
   那只狗太饿了，开始在地板上啃食面包屑。
3. 3. After dinner, she picked up the crumbs from the table and put them in her pocket.
   晚饭后，她从桌上捡起面包屑放进她的口袋。