2/ PoS is a block author selector and Sybil resistance mechanism.
In short, it’s a way for a blockchain network to decide who gets to publish the next block of transactions and to ensure that a single person can’t pretend to be many different entities.
2/ PoS是区块作者选择器和Sybil抵抗机制。
简而言之，这是区块链网络决定谁可以发布下一个交易块并确保一个人不能假装是许多不同实体的一种方式。