Examlex
Explain interferometry and provide an example of an observatory that uses this technique.
Chinese Society
The social structure, customs, and way of life of the people living in China, characterized by its long history, traditions, and cultural evolution.
American Cities
Urban areas within the United States that are notable for their significant population, cultural heritage, and economic contributions.
Middle Class
A social class between the upper and working classes, including professional and business workers and their families.
Internal Slave Trade
The buying and selling of slaves within the borders of a country, notably within the United States before the Civil War.
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