在您的搜寻 主题建议
在您的搜寻 主题建议
Forecasts
Twenty-first century
32
Twentieth century
14
Forecasting
9
Economic forecasting
5
Economic conditions
3
Social prediction
3
Technology
3
Civilization
2
Civilization, Modern
2
History
2
Research
2
Social conditions
2
Architectural design
1
Cities and towns
1
Congresses
1
Democracy
1
Depressions
1
Disasters
1
Drug industry
1
Drugs
1
Ecology
1
Economic history
1
Economic policy
1
Education
1
Effect of human beings on
1
Energy conservation
1
Energy consumption
1
Environmental protection
1
Geopolitics
1
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