perforating stamp

例句：

1. 1. This stamp isdesigned to be used on official documents.
   这种邮票被设计用来在官方文件上使用。
2. 2. The stamp was made from a specialtype of metal that can be easily perforated.
   这种邮票是用一种可以容易穿孔的特殊金属制成的。
3. 3. The stamp has aunique design that makes it easy to readand understand.
   这种邮票有一个独特的设计，使得它易于阅读和理解。