由于父节点的名称空间前缀可以被一个子节点覆盖，比如默认名称空间，因此如果名称空间已被复制到目标，那么就不会再次复制该名称空间。

Because a namespace prefix in a parent node can be overridden by a child node, for example default namespace, a namespace is not copied again if it has been copied to the target.

youdao

不过，在我们发送此缓冲区前，我们需要确保它的父节点是服务器的状态空间中的某点。

However, before we send this buffer, we need to make sure that it is parented off of some point in server state space.

youdao

架设桥梁时候，我们的不变地方是桥梁始终以服务器状态空间中某点为父节点，并且是用来转换引入的服务器操作需要的这样一个操作。

With the bridge, our invariant was that the bridge would always be parented off of a point in server state space and would be the one operation needed to transform incoming server operations.

youdao