/fɔrml ˈtriːti/ – Phrase
Definition: hiệp ước chính thức.
A more thorough explanation: A formal treaty is a legally binding agreement between two or more sovereign states or international organizations that is typically negotiated and signed by authorized representatives. Treaties are governed by international law and are intended to establish rights and obligations between the parties involved.
Example: The two countries signed a formal treaty outlining the terms of their trade agreement.