All this pseudo column does is to return 1 if a given row is a leaf in recursion.
这个伪列只是当一个给定行在递归中是叶子的时候返回1。
The pseudo column LEVEL is used in a string to make the hierarchy visible.
可在字符串中使用伪列LEVEL，使分层结构变得可视。
Unless Oracle has introduced yet another pseudo column or keywords that I'm not aware of, all of Oracle's recursive features have now been mapped to DB2 UDB for Linux, UNIX, and Windows.
除非oracle引入了我不知道的其他伪列或关键字，否则Oracle所有的递归特性现在都被映射到DB 2UDB forLinux、UNIX和Windows。
The pseudo column value is also used to sort the query results in breadth-first sequence.
还可以使用伪列值按照宽度优先顺序对查询结果进行排序。
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.
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。
Another way to use the LEVEL pseudo column is shown in the following example.
下面的示例中将显示使用level伪列的另一种方法。
In the following example, the pseudo column LEVEL is specified on the select list.
在下列示例中，在选择列表中指定伪列LEVEL。
LEVEL - the pseudo column LEVEL returns an integer value that represents the recursive step in the hierarchy at which the row was produced.
LEVEL—伪列LEVEL返回一个整数值，表示所生成行的分层结构中的递归步骤。
The pseudo column LEVEL can be used in the ORDER BY clause to return the result set in search breadth first sequence.
可在ORDERBY 子句中使用伪列LEVEL按照搜索宽度优先顺序返回结果集。
The results of pseudo-static experiment reveal that the passively split pier has better ductility and energy dissipation capacity than those of the common ductile pier column.
拟静力试验表明：与普通延性墩柱相比，被动分肢墩具有更好的延性和耗能能力。
The ductile earthquake performance of one-column bridge piers, which are used frequently at the railway bridge, is studied by pseudo-static test for 24 large-scale pier models.
针对铁路桥梁中使用量最大、应用最广泛的单柱式桥墩，通过24根大比例的桥墩模型的伪静力试验，研究了其延性抗震性能。
The ductile earthquake performance of one-column bridge piers, which are used frequently at the railway bridge, is studied by pseudo-static test for 24 large-scale pier models.
针对铁路桥梁中使用量最大、应用最广泛的单柱式桥墩，通过24根大比例的桥墩模型的伪静力试验，研究了其延性抗震性能。
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