访客只有在特殊情况下才被允许。

Visitors are only permitted under ___exceptional circumstances.

存在一些特殊情况，人们会在其中做出糟糕的决定。

There are ___exceptional situations where people make poor decisions.

她的才华确实非凡；这样的技能很少见。

Her talent is truly ___exceptional; such skill is rarely seen.