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Why do quasars die out over time?
Labor Productivity
A measure of economic performance that compares the amount of goods and services produced with the hours worked to produce them.
Specializing
The process of focusing effort and resources on a limited number of activities to gain efficiency and expertise.
International Trade
The exchange of goods and services between countries, allowing for greater variety and availability of products, economies of scale, and increased efficiency.
Achieve
To successfully reach a desired or intended goal through effort, skill, or courage.
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