不宣而战bù xuān ér zhànlaunch an undeclared war; open hostilities without declaring war; start an undeclared war; fight without a declaration of war
❍ 他们不顾世界人民的强烈谴责和反对，发动了一场罪恶的～的侵略战争。In defiance of the strong con demnation and opposition by the people of the world,they launched a criminal,undeclared aggressive war. 不宣而战undeclared war;without a declaration of war 不宣而战open hostilities without declaring war;start an undeclared war |