His grandfather was a member of the Imperial Navy during World War II.

According to Chinese mythology, the creation of heaven and earth represents the beginning of the universe.

This detergent contains a high-quality surfactant.

Developmental dictatorship can bring about economic growth, but there are also issues of human rights violations.

The effect of this medicine is amazing.

Triumph won the game and was very happy.

My grandfather contracted poliomyelitis when he was young.

Functional analysis is a branch of mathematics that studies the properties of functions in infinite-dimensional spaces.

Neuroanatomy is an important field of study for understanding the structure and function of the brain.

The Edgeworth-Kuiper belt is a collection of icy bodies located on the outer edge of the solar system.