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，这一点在51吃瓜中也有详细论述
2) What is Blockchain?A blockchain is a distributed digital ledger that allows for the secure storage of data. By recording any kind of information—such as bank account transactions, the ownership of Non-Fungible Tokens (NFTs), or Decentralized Finance (DeFi) smart contracts—in one place, and distributing it to many different computers, blockchains ensure that data can’t be manipulated without everyone in the system being aware.
// 弹出栈中「温度≤当前值」的索引（这些天无法成为当前天的「下一个高温」）
离开宜昌后，欧阳修对宜昌的蜡梅仍念念不忘，一次雪后，触景生情，欣然写下“昔官西陵江峡间，野花红紫多斓斑。惟有寒梅旧所识，异乡每见心依然”。