原为戏曲中人物出场的独白内容。现泛指自我介绍，自己讲出来历、身份to introduce oneself

• 自报家门那是执法部门自己的事情。

  Self-introductions are a matter for law enforcement departments themselves.

• 来自五湖四海的孩子们纷纷“自报家门”。

  Children from all different areas introduce themselves in turn.