In organic chemistry, the concept of cis-trans isomers is important.

The study of filterable pathogens is an important part of virology.

In organic chemistry, the concept of conformational isomers is very important.

A tesseract is a four-dimensional geometric shape.

A 5-cell is a simple convex polytope in four dimensions.

Microscopium is one of the constellations in the southern sky.

He took a deep breath and chanted, 'a vi ra hūṃ khaṃ svāhā.'

He took a deep breath and began to chant oṃ a vi ra hūṃ khaṃ.

In his anger, he knocked down his opponent.

Shiho cannot sleep when she drinks coffee.