这些规则表明一个应用程序不能预知具体的特性元素名或几何元素名，它们有可能出现在 GML 实例文档。
These rules suggest that an application cannot predict the concrete feature element names or geometry element names that might appear in a GML instance document.
这个应用程序的功能仅仅检查用GML实例文档编码的地理特性是否包含至少一个几何元素。
The functionality of the application is simply to check whether the geographic features encoded in a GML instance document contains at least one geometry element.
采用蚁群算法对食品机械四杆机构进行最优化设计，分析建立杆尺寸间的几何联系，并结合具体实例确定四杆机构各个参数。
The ant colony algorithm was used to carry on optimization design of four-bar mechanism for food machinery, analyzing and building the geometric relation between the linkage.
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