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5 天前 · Bitcoin (abbreviation: BTC; sign: ) is the first decentralized cryptocurrency. Nodes in the peer-to-peer bitcoin network verify transactions through cryptography and record them in a public distributed ledger, called a blockchain, without central oversight. Consensus between nodes is achieved using a computationally intensive process based on proof of work, called mining, that guarantees the ...
2 天前 · Miami,[11] officially the City of Miami, is a coastal city in the U.S. state of Florida and the seat of Miami-Dade County in South Florida. It is the core of the much larger Miami metropolitan area, which, with a population of 6.14 million, is the second-largest metropolitan area in the Southeast after Atlanta, and the ninth-largest in the ...
