Phonons are an important concept in solid state physics.

My friend came from the Slovak Republic.

I want to go to the Republic of Serbia.

My favorite dessert is annin tofu.

He was told by the doctor that he might have been infected with hydrophobia.

This document contains environment-dependent characters.

He is deeply interested in the doctrines of Jainism.

Jainism is a religion that emphasizes the teachings of non-violence and respect.

In physics class, I learned about the properties of convex mirrors.

He has arachnophobia, and he panics as soon as he sees a spider.