无懈可击的

例句：

1. 1. The defense was so strong that no one could find a flaw in their arguments.
   防御非常坚固，没有人能找到他们的论点中的漏洞。
2. 2. The team's performance was so impressive that it made them feel like they were unbeatable.
   团队的表现令人印象深刻，让他们觉得自己无敌。
3. 3. The castle was so well-built that even the strongest attackers couldn't breach its walls.
   城堡建造得如此坚固，以至于最强大的攻击者都无法突破它的城墙。