location of table at coordinates 工作台坐标定位
Looking at the sample contents table, you can see that a country's geographic coordinates and area are always given in the same format.
查看示例内容表，可以看到国家的地理坐标和面积总是采用相同的格式。
Whether derived from address information, acquired by GPS devices, or otherwise generated, many databases contain geographic coordinates of point locations as separate numeric columns in a table.
无论是从地址信息中推导出来的、由GPS设备获得的还是以其他方式生成的，许多数据库都包含点位置的地理坐标，这些信息在数据库中保存为单独的数字列。
The column pdb_id is the foreign key that links atom coordinates to the corresponding PDBML document in the PDBXML table.
列pdb_id是一个外键，链接了原子坐标与pdbxml表中对应的PDBML文档。
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