crumb:
n. 面包屑，碎屑；少许
vt. 弄碎；捏碎
I stood up, brushing crumbs from my trousers.
我站起来，掸掉裤子上的碎屑。
She flicked a crumb off the corner of her mouth.
她轻轻擦去了嘴角的面包屑。
crumble:
vi. 崩溃；破碎，粉碎
vt. 崩溃；弄碎，粉碎
n. 面包屑
All his hopes began to crumble away.
他所有的希望开始化为泡影。
Rice flour makes the cake less likely to crumble.
这种糕饼用米粉做不那么容易碎。
