杰斐逊的文件形成了一个新国家的基础。

Jefferson's document formed the ___foundation of a new nation.

爱、理解和尊重将是我孩子成长的基础。

Love, understanding and respect will be the ___foundation of the upbringing of my children.

这个理论是现代物理学的基础。

This theory serves as the ___foundation for modern physics.