fortified

重兵设防的

Indicates a high degree of fortification, typically for military defense.

指防御工事程度很高，通常用于军事防御。

坚固设防的

Indicates a high degree of fortification, emphasizing strength.

指防御工事程度很高，强调其坚固性。

被加强

Used in the passive voice to describe the state of being strengthened or protected.

用于被动语态，描述被加强或保护的状态。

设防以抵御

Specifies the threat from which protection is provided.

指明所要抵御的威胁。