I am studying Japanese.

Their relationship is codependent, they depend on each other.

He and I share a lot of things.

This alloy has a eutectic composition.

She can speak both languages fluently.

He learned about the concept of synergism in theology class.

Humans and nature should coexist.

The coexistence of humans and nature is important for the sustainability of the Earth.

He was born as an illegitimate child and experienced many difficulties.

My grandfather used to till his privately-owned rice field.