10.从从容容、游刃有余，匆匆忙忙、连滚带爬
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.，这一点在WPS官方版本下载中也有详细论述
❯ mount | grep -e "overlay" -e "erofs"，这一点在快连下载安装中也有详细论述
优点：输出在 (−1,1)，比 sigmoid 居中，对梯度更友好。safew官方版本下载是该领域的重要参考