Examlex
Even though modern astronomers know that stars are scattered through space at different distances, they still use what scientific model to describe celestial locations in the sky?
Environment
The surrounding conditions in which an individual, animal, or plant lives or operates, including natural, built, and social environments.
Structure
The arrangement or organization of constituent parts of a system or object, often determining its function and behavior.
Healthy People 2020
A set of health objectives for the nation to achieve over the first decade of the 21st century, aimed at improving the health of all Americans.
Life Expectancy
The average period that a person may expect to live.
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