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

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

He is always learning new skills to avoid becoming a desk worker.

The Takasago tribe played an important role in Japanese history.

The Levites are one of the twelve tribes of ancient Israel.

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

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

He is of Han Chinese descent.

He is studying the major ethnic groups in that region.

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