Examples:

A tree is a trunk and branches…and the roots…from which it originated and these three aspects are a unitary wholeness of one tree.

A leaf is two symmetrical sides and a stem in the middle of the leaf  and that is attached to the branches…from which the two sides of the leaf originate and these three aspects of a leaf are a unitary wholeness of a leaf.

A + and a – charge integrating/interacting with each other is Electro-magneticism/Electricity and they are all a unitary wholeness/active process

A human being is a body and a mind and the Self Awareness/Consciousness which animates and perceives that body and that mind and when their experiences are all integrated they are a unitary flowing of that whole.

In every example the Duality is the apparent/physical/manifested reality and the Trinitarian aspect is the

first/a priori/primary/original/originating/subtle/not always perceived but essential and completing reality