pumpernickel

例句：

1. 1. Themuseum has a special exhibit on the historyof the pumpernickel coin.
   博物馆有一个关于镍币历史的特别展览。
2. 2.She found a pumpernickelin her pocket and decided to use itfor a small purchase.
   她在口袋里发现了一枚镍币，决定用它来买一个小东西。
3. 3. The pumpernickelis a popular currency in many countries aroundthe world.
   镍币是世界上许多国家广泛使用的货币。