建筑工地严格禁止未授权人员进入。

The construction site is strictly ___off ___limits to unauthorized personnel.

军事演习期间，整个训练场被宣布为禁区。

During the military exercise, the entire training ground was declared ___off ___limits.

没有适当的安全许可，禁止进入服务器机房。

Access to the server room is ___off ___limits without proper security clearance.