adj. 不可攻破；[化工] 耐侵蚀的
able to withstand attack
同义词： impregnable / inviolable / secure / strong / unassailable
耐侵蚀的
... unassorted 未分级的；未分选的 unattackable 耐侵蚀的 unattenuated 未变稀的；未变细的 ...
... 攻破垄断 break the monopoly 不可攻破 unbreakable ; Unattackable 攻破击败 breach and defeat ...