With the column names stored as attributes, extra code is required to locate a collection of all of the elements from a specific column. 将列名存储为属性的话,需要额外的代码来从特定的列找到所有元素的集合。
Check out the index accompanying this column; aren't experiences like those worth just a little bit of extra effort? 读者不妨看看这个专栏的文章索引,那些特殊的体验难道不值得你为此做出一点额外的努力吗?
If the column is indexed, extra processing occurs. 如果该列被索引,则需要进行额外的处理。