bread shell

例句：

1. 1.The bread shell was hard to digest.
   面包壳很难消化。
2. 2. She ate the last piece of bread and then threw the shell away.
   她吃完最后一片面包，然后把壳扔掉了。
3. 3. The crust of the bread is crispy and delicious.
   面包的外皮脆而美味。