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How many numbers in a scientific measurement are always an estimate?
Great Depression
A severe worldwide economic downturn that lasted from the late 1920s through the 1930s, leading to mass unemployment and poverty.
World War II
A global conflict that lasted from 1939 to 1945, involving most of the world's nations, including all of the great powers, eventually forming two opposing military alliances: the Allies and the Axis.
Fundamental Alteration
A significant change that fundamentally modifies the nature of something, often used in legal and policy contexts to describe changes that affect the essence of a policy, practice, or procedure.
Mass Immigration
The large-scale movement of people from one country to reside in another country, often causing significant demographic and social impacts.
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