Projective geometry is a branch of mathematics that studies geometric objects such as points, lines, and planes and their relationships.

Riemannian geometry is a field of mathematics that studies geometric objects such as curves and surfaces.

He is an expert in physical anthropology.

He is an expert in physical anthropology, conducting research on human evolution.

Gestalt psychology is an important means to understand human cognitive processes.

He said, 'Each person has one life, like a pike or a shrimp,' and decided to live his life with care.

A day without seeing her feels like an eternity of waiting impatiently.

This univalve has beautiful colors, doesn't it?

His story is a mix of truth and fiction, and I don't know what's true.

This painting is my most precious item under heaven.