请注意，此实现在更新时要求使用者提供正确的修订计数器；进行纠正的责任分散到数据库、提供者和使用者三者身上。

Note how this implementation requires the consumer to provide an accurate revision counter when it is being updated; responsibility for correctness is spread across database, provider, and consumer.

youdao

采用的方法是由第三方注册中心维护一个已知服务提供者的数据库。

The idea is that some third-party registry maintains a database of known service providers.

youdao

现在，让我们为数据库创建新的提供者。

Now, let's create a new provider for the database.

youdao