a pencil sharper

• 卷笔刀

a pencil sharper的用法和样例：

例句

1. Nobody else has a pencil sharpener.
   再没有谁有卷笔刀了。
2. If a variable becomes a jar or a function becomes a crazy pencil sharpener, you're more likely to remember the relationship later.
   如果一个变量变成一种罐头，或一个函数变成一个疯狂的卷笔刀的话，你会更有可能记忆知识之间的关系。