The culture of classical antiquity has a significant impact on the modern world.

Vitamin B12 is an important nutrient for maintaining the health of the nervous system.

He is studying the major ethnic groups in that region.

The police are closely monitoring the activities of the motorcycle gang.

Aromatic compounds are a group of compounds with specific chemical properties.

The culture of the Zhuang people is very unique, and their traditions and customs have a deep history.

The Qiang people are one of the ethnic minorities in China.

Aliphatic compounds are organic compounds in which carbon atoms form straight or branched chains.

The study of crystal classes is an important part of mineralogy.

The Indo-European languages are some of the most widely spoken in the world.