a nuclear-weapons free Korea的用法和样例：
- One who prepares a nuclear weapon for release.
- Could there be an accidental detonation of a nuclear weapon?
- Mr.ElBaradei said he could not confirm whether North Korea has conducted a nuclear weapons test.
- He says the need to since North Korea tested a nuclear weapon last month. Reach an agreement with urgent.
- Selig Harrison said senior officials warned that North Korea was now a nuclear weapons state and would not commit itself on when it would give them up.
- "I know for sure that North Korea has the plutonium that they need for a nuclear weapon," he said.