人 民 网 版 权 所 有 ，未 经 书 面 授 权 禁 止 使 用
Tracing and identifying the sources of an outbreak is a challenging task that can take months or years. Thanks to the Blockchain, however, companies now know exactly where their food has been—so they can trace its location and prevent future outbreaks.
，这一点在夫子中也有详细论述
How is my data handled?
국힘서 멀어진 PK…민주 42% 국힘 25%, 지지율 격차 6년만에 최대