path expression

• 路径表达式

path expression的用法和样例：

例句

1. A location path can be absolute or relative.
   区域路径表达式可以是绝对路径，也可以是相对路径。
2. The problem of low query efficiency based on path expression was well solved with dual index strategy.
   双重索引策略很好地解决了基于路径表达式查询效率低的问题。