adj.未经授权的；未经批准的

Ensure unauthorized personnel do not enter confined space. 确保未经授权的人员进入有限空间。

Firewalls prevent unauthorized access from a private network. 防火墙防止来自专用网络未经授权的访问。

This clause provides against any unauthorized absence from duty. 这一条条文禁止任何未经批准的缺勤。