crust
noun
krʌst
noun
1
the
hard
brown
outer
surface
of
bread
面包皮
sandwiches
with
the
crusts
cut
off
切掉面包皮的三明治
2
the
baked
outer
part
of
foods
such
as
pies
or
pizzas
〔馅饼或比萨饼等的〕酥皮
a
thin
crust
pizza
薄皮比萨饼
3
a
thin
hard
dry
layer
on
the
surface
of
something
〔某物的〕硬薄外层 （表面 ）
A
hard
gray
crust
had
formed
on
the
bottom
of
the
tea
kettle.
茶壶底部结了一层灰色的垢。
4
the
hard
outer
layer
of
the
Earth
〔地球的〕地壳
deep
within
the
Earth’s
crust
在地壳深处