什麼叫absolute poverty and relative poverty?

poverty: Poverty is the condition of people who lack adequate income and wealth.

absolute poverty: People are absolutely impoverished if the minimum amounts of food, clothing and shelter necessary for survival absorb all of their income, and they live a razor’s edge existence.

relative poverty: People are relatively impoverished if the customary (average) standard of living in their society requires more spending than the income they have available. This standard changes as a society becomes more prosperous.