Трамп высказался о непростом решении по Ирану09:14
What is the difference between Blockchain and a Database?Generally a database is a collection of data which can be stored and organized using a database management system. The people who have access to the database can view or edit the information stored there. The client-server network architecture is used to implement databases. whereas a blockchain is a growing list of records, called blocks, stored in a distributed system. Each block contains a cryptographic hash of the previous block, timestamp and transaction information. Modification of data is not allowed due to the design of the blockchain. The technology allows decentralized control and eliminates risks of data modification by other parties.
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规模效应之下，头部集团的资源吸附与会员掠夺能力持续强化，而尚处消费生态构建阶段的腰部集团则承压日增。此消彼长之间，行业“方差”还将持续扩大，马太效应愈发凸显。
英國超市將巧克力鎖進防盜盒阻止「訂單式」偷竊