query graph的用法和樣例：
例句
- The right side of the diagram shows the elements that are included in the current query.
右邊的關係圖顯示了當前查詢中包含的元素。 - An approach to approximate querying of general graph structured semistructured data is proposed based on a relational database system.
提出一種利用關係資料庫系統在一般圖結構的半結構化數據上進行近似查詢的途徑。
