It's already late, so good night.

His painting is drawn using the golden ratio.

We need to combine our forces to make this project successful.

That plan is based on rational thinking.

Please research the interaction between these two drugs.

An old person was playing with his grandchild in the park.

Our school's motto is 'Knowledge is power.'

In Japanese, honorific language is an important way to show respect to others.

He is always condemning others with abusive language.

He is a rationalist, making all decisions based on logic and facts.