postage stamp

邮票

A mark or words printed over a postage stamp to note a change in use or a special occasion.

邮戳印于邮票以上说明该票文所表示用途变化，或标明为纪念一特殊时刻而发行的符号或文字

Sheets of postage stamps are perforated.

一张张的邮票都打过接缝孔。