TENNESSEE, USA — Today: Sunny and chilly. Highs in the middle 30s. Tonight: Lows in the upper teens to near 20 degrees tonight. Thursday: Plenty of sunshine and breezy. Highs in the middle 40s.

Nokia used to be one of the world's biggest mobile phone manufacturers but it fell behind with the advent of iPhone and Android smartphones. In 2014, Nokia's Devices and Services division was sold to ...

加密货币是一种数字形态的货币。他们属于数字资产，可用于购买商品和服务。加密货币也可储存价值、记账和作为交换中介。分布式账本(又称“区块链”)保障了这种数字资产的安全。第一个加密货币是比特币，中本聪(假名)创造了这种加密货币，并在2009年 ...