post and core material的用法和樣例：
例句
- Neutron coincidence counting is widely used in the authentication and management of nuclear material.
中子符合計數在核材料認證和管理中有著(zhù)廣泛的應用。 - Earlier this year government inspectors smuggled enough radioactive material to make two dirty bombs across two different border crossings.
今年早些時(shí)候，有政府檢驗人員通過(guò)兩個(gè)邊境站走私進(jìn)了足以制造兩顆臟彈的核材料。
