seal with semicircular annular groove

例句：

1. 1. The seal of the government is a symbol of authority.
   政府的印章是权威的象征。
2. 2. The seal on the passport is a unique design.
   护照上的印章是独一无二的设计。
3. 3. The seal was removed from the document to reveal its contents.
   为了揭示文件内容，将印章从文件中移除。