Data object being navigated or modified are not as obvious as they would be with a user-defined object wrapper.

导航或修改的数据对象不如使用用户定义的对象包装器时那么明显。

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Federated object registration: a wrapper encapsulates the data source characteristics from the federated engine.

联邦对象注册：包装器封装了来自联邦引擎的数据源特征。

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You can think of a connection handle as a wrapper object of a physical connection.

您可以将连接句柄设想为物理连接的一个包装对象。

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