军队加强了边境的防御工事以应对潜在威胁。

The military strengthened the border ___defences to counter potential threats.

他在会议上提出了有力的辩护来支持自己的观点。

He presented strong ___defences to support his position during the meeting.

我们的防守队员成功地阻止了对方的进攻。

Our ___defences successfully stopped the opponent's attack.

否认是她应对创伤的一种心理防御机制。

Denial is one of her psychological ___defences against trauma.