2/ The second upgrade is a new cross-chain mechanism allows governance proposal to be passed from the Ethereum mainnet to the @optimismPBC and @arbitrum chains.
The UMA governance mechanism on layer 1 can be used to govern UMA contracts on the supported layer 2 chains.
2/第二次升级是一种新的跨链机制，允许将治理方案从以太坊mainnet传递到@optimismPBC和@arbitrum链。
第1层上的UMA治理机制可用于治理受支持的第2层链上的UMA合同。