能够迅速使敌对双方连成一气的，是当双方都感受到一个潜在敌人的威胁，而这个敌人又比它们其中任何一方更具危险性。

• Be that as it may, nothing will more swiftly unite two previous foes in a common front if they are threatened by a potential enemy perceived to be more dangerous than their erstwhile opponent.