Demography is a part of social science that studies the structure, evolution, and problems of human population.

I bought a new book.

He is good at fighting using the Tekkō-kagi.

He is conducting research on mining.

I prefer the latter over the former.

They are engaged in a fight with the local gang.

That high-rise building has become a landmark of this city.

My younger brother will enter the engineering department next year.

The binturong is a nocturnal animal that mainly lives in trees.

Rigor mortis is the phenomenon where part or all of the body stiffens after death.