核 + Noun
核 (hé) is a noun meaning "nucleus" or "core," and it is commonly used as a modifier meaning "nuclear." It appears in compound words related to nuclear science or energy. For example, 核研究组织 means "nuclear research organization."
这个国家正在发展核能源。
Zhège guójiā zhèngzài fāzhǎn hé néngyuán.
This country is developing nuclear energy.
核技术在医学领域也有很多应用。
Hé jìshù zài yīxué lǐngyù yě yǒu hěn duō yìngyòng.
Nuclear technology also has many applications in the medical field.
科学家们在讨论核安全的问题。
Kēxuéjiāmen zài tǎolùn hé ānquán de wèntí.
Scientists are discussing issues of nuclear safety.