Examlex
There are about 500 million alveoli in an adult lung.
United States
A country located in North America, comprising 50 states and a federal district, known for its significant influence in global economic, political, and cultural matters.
International Trade
The exchange of goods and services between countries, driven by comparative advantages and resulting in increased economic efficiency and wealth.
World Output
The total production of goods and services by all countries in the world over a specified period.
Consumption Levels
The quantity of goods and services that individuals or communities use or consume.
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