One blockchain isn’t enough to support a bustling future of decentralized applications. The limited throughput and lack of runtime specialization in early blockchains made them impractical for scaling in many real-world use cases. By bridging multiple specialized chains together into one sharded network, Polkadot allows for multiple transactions to be processed in parallel. This system removes the bottlenecks that occurred on earlier networks that processed transactions one-by-one. Polkadot will be able to scale even further in the future with a planned feature known as nested relay chains, which will increase the number of shards that can be added to the network. 一个区块链不足以支持a 去中心化应用程序的繁荣未来。 有限的吞吐量和缺乏运行时 早期区块链的专业化 它们不适合在许多地方扩展 真实的用例。 通过桥接多个专用链 一起组成一个分片网络，波尔卡多 允许多个事务 并行处理。这个系统删除 之前发生的瓶颈 处理交易的网络 一个接一个。 Polkadot将能够进一步扩大规模 未来有一个计划中的功能叫做 嵌套的中继链，这将增加 的可添加的碎片数 网络。

wood说以后波卡会帮助以太坊 所以我两个都定投