international law; law of nations
国際法は国家間のルールだ。
International law is the body of rules governing relations between states.
その行為は国際法に違反していると批判された。
The action was criticized as a violation of international law.
国際法の専門家として各国の紛争解決に携わる。
As an expert in international law, I am involved in resolving disputes between countries.