Data availability is a crucial component to make sure that the data necessary to check a parachain block can be recovered for the purposes of fraud detection.
Read how data availability and fraud detection work in Polkadot from Polkadot founder, @rphmeier:https://hubs.ly/Q014m0tp0
数据可用性是一个至关重要的组成部分，可以确保检查副链块所需的数据可以恢复，以便进行欺诈检测。
阅读Polkadot创始人@rphmeier在Polkadot中的数据可用性和欺诈检测工作：https://hubs.ly/Q014m0tp0