1. Superman's invulnerability allows him to withstand any physical attack.
超人的无懈可击使他能够承受任何身体攻击。

2. The fortress was built with layers of defense mechanisms to ensure its invulnerability.
这座堡垒建有多重防御机制，以确保其无敌性。

3. Although she seemed strong and invulnerable on the outside, she still had her own insecurities.
虽然她表面上看起来坚强而不可伤害，但她仍然有自己的不安全感。