foundational

这些基本概念为学生理解更复杂的理论打下了基础。

These ___foundational concepts help students build understanding of more complex theories.

这些基础法律文件确立了国家治理体系的核心框架。

These ___foundational legal documents established the core framework of the national governance system.

这些基本技能是学习任何新语言的基础。

These basic skills are ___foundational for learning any new language.