The service implementation queries the provider using the key and gets the corresponding value object associated with that key.
服务实现查询使用密钥的提供程序，并获得与该密钥关联的对应值对象。
Lists topics for creating queries with parameters, which allow a different value to be used each time you run the query.
列出关于创建带参数的查询的主题，参数允许在每次运行查询时使用不同的值。
When a Registry call queries values associated with a dynamic key, that function is called to return the desired value or values.
当注册表调用查询与动态项关联的值时，会调用该函数以返回所需的一个或多个值。
When a Registry call queries values associated with a dynamic key, that function is called to return the desired value or values.
当注册表调用查询与动态项关联的值时，会调用该函数以返回所需的一个或多个值。
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