an act of war
战争行为，指敌对行动或具有敌对性的行为
正式·政治或军事用语
英文释义
an aggressive action, typically involving physical force, that is considered a provocation or cause for conflict
例句
The bombing of the embassy was considered an act of war by the international community.
典故来源
直接源于军事和政治领域，指一国对另一国采取的侵略性行动，足以引发武装冲突。