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barter▼(exchange of goods or services)noun[UK: ˈbɑː.tə(r)] [US: ˈbɑːr.tər]In primitive societies barter was used. = En las sociedades primitivas se usaba el trueque.
swap [swaps]▼(exchange)noun[UK: swɒp] [US: ˈswɑːp]
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