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Why doesn't warm, dense hydrogen emit 21-cm radiation?
Importing
The process of bringing goods or services into a country from abroad for sale.
Tariff
A tax or duty to be paid on a particular class of imports or exports.
Consumer Ethnocentrism
The tendency to believe that it is inappropriate, indeed immoral, to purchase foreign-made products.
Economic Integration
The process by which countries reduce barriers to trade and coordinate their economic policies to improve economic cooperation and integration.
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