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... d currency.
This item is resistant to corrosion, and its molecular structure is stable, making it valuable in research and other fields.
Since ancient times, it has been an irreplaceable wealth.
Liang Yuan figured that once everyone solved the basic needs, they would need a standard to measure the value of items for trading.
Gold would likely become the currency unit again by then.
With a satisfied smile, Liang Yuan was very pleased with the haul after sca ...
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