He is an expert in sociolinguistics.

I am very interested in sociolinguistics.

He is attending a programming school to learn object-oriented languages.

My favorite string instrument is the violin.

He was arrested in flagrante delicto.

He is good at speaking the dialect of that region.

The Hogen era is a Japanese era name that lasted from 1156 to 1159.

The atomic clock shows a very accurate time.

Understanding the structure of the atomic nucleus is an important part of physics.

Pathogens can pose a significant threat to human health.