Positive charge is a type of electric charge of matter.

It's very interesting to learn about the history of the Shōkei era.

Hiragana is one of the characters in Japanese.

I am a believer in Orthodoxy.

This regular tetrahedron is composed of equilateral triangles on all sides.

In this chemical reaction, a specific isotope is produced.

She wrote her name in cursive script.

This sentence is written in bold typeface.

This pathogen is very dangerous to humans.

There is a possibility that unknown lifeforms exist on this planet.