zhǐ / yǒu / wǔ / qì / jí / de / hé / cái / liào / cái / néng / bèi / yòng / lái / zhì / zào / hé / wǔ / qì

只有武器级的核材料才能被用来制造核武器。

Only weapons-grade nuclear material can be used to manufacture nuclear weapons.