Demography is a branch of social science that studies the structure, distribution, and changes in human population.

He has a deep interest in etymology.

My mother has been suffering from temporomandibular joint dysfunction for many years.

He is an expert in dynamics, helping to solve complex problems in physics.

He is interested in the study of futurology.

He is very interested in anatomy.

He has full mastery of the art of cooking.

I greeted the neighbor.

He chose this town as a foothold for his new business.

He seems to be enjoying his trip.