矢量数据指的是通过几何结构定义的数据，如线段表示街道，而点表示位置。
Vector data refers to data defined by geometric constructs, such as line segments representing a street or points representing single locations.
对于DB 2索引扩展要注意的一点是对用户定义类型的需求—distinct类型或结构化类型。
One thing to be aware of regarding DB2 index extensions is the requirement for user-defined types - either distinct types or structured types.
该方法充分利用页面路径包含的网站层次结构所体现的分类信息，将同一目录中的页面定义为一个兴趣点。
The method defines all the pages in the same content of page hierarchy as an interest point, and extracts interest points in a session.
本文结合人脸结构生理学基础，定义人脸的特征点集；
The paper integrates with physiological basis of facial structure, and defines facial feature points set;
更通用一点的定义是：一个瞬间就是指时间线上只出现一次且唯一的一个时间点，并且这种日期结构只能以一种有意义的方式出现一次。
To define it generically: an instant is a point on the time line that is unique and occurs only once, and such a date construct can occur only once in a meaningful way.
本论文主要以健身游憩空间的概念定义辨析与空间结构研究为立足点，归纳提出城市健身游憩空间的理想结构模式；
The dissertation summarized the ideal model of city fitness recreation spatial structure, which is based on the concept and the structure study of city fitness recreation space;
本论文主要以健身游憩空间的概念定义辨析与空间结构研究为立足点，归纳提出城市健身游憩空间的理想结构模式；
The dissertation summarized the ideal model of city fitness recreation spatial structure, which is based on the concept and the structure study of city fitness recreation space;
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