/ˈn(j)uː.kliː.ər friː zoʊn/ – Phrase
Definition: khu vực không có hạt nhân, khu vực phi hạt nhân.
A more thorough explanation: A nuclear-free zone is a designated area, typically a region or territory, where the development, testing, deployment, and use of nuclear weapons and nuclear power facilities are prohibited by law or international agreement.
Example: The city council passed an ordinance designating the downtown area as a nuclear-free zone, prohibiting the storage and use of nuclear materials within city limits.