/ˈpɜːrmənənt ˈtriːti/ – Phrase
Definition: hiệp ước lâu dài, hiệp ước vĩnh cửu.
A more thorough explanation: A permanent treaty is a legally binding agreement between two or more parties that is intended to remain in effect indefinitely, without a specified expiration date or termination clause.
Example: The two countries signed a permanent treaty to establish long-term diplomatic relations.