八卦由单卦演变到重卦，是一个漫长的历史过程。

It is a long history for the Eight Diagrams to evolve into the Double Diagrams from the Single Diagram.

youdao

八卦由单卦演变到重卦，是一个漫长的历史过程。

It is a long history for the Eight Diagrams to evolve into the Double Diagrams from the Single Diagram.

youdao