He is an expert in orthoepy, teaching pronunciation.

He is an expert in planetary science.

Scientists are warning that this substance is carcinogenic.

He supports the restoration of monarchy.

My house faces a quiet residential road.

Whenever I catch a cold, I always take Seirogan.

The study of benthos is an important field in marine biology.

This substance does not mix with water due to its high hydrophobicity.

Sexual exploitation is an absolutely unforgivable crime.

The 24-cell is one of the geometric shapes in four dimensions.