伪列是具有预先定义的名称的标识符，其中包含关于分级查询的信息；它的用途类似于表中的任何列。
A pseudo column is an identifier with a predefined name that holds information about the hierarchical query and that can be used like any column in a table.
这个样例的结果解析器然后将这个语句解析为一个我们预先定义的已命名查询。
The sample's result resolver will then resolve this statement to a named query which we predefined as.
“asadmin”CLI提供了你所选择对象的监控快照，比如Web容器，这是通过查询预先定义的试样(probe)实现的。
The "asadmin" CLI also provides monitoring snapshots on the objects of your choice, such as Web container, by querying the pre-defined probes.
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