1·There were reports of columns of military vehicles appearing on the streets.
有报道称街道上出现了多列军车车队。
—— 《柯林斯英汉双解大词典》
2·For the application, load a simple table with employee data; the table will support sorting on any of its columns.
对于应用程序，加载一个包含雇员数据的简单表；该表将支持对其任何列进行排序。
3·These rules provide more detailed information about the relationships and restrictions that exist on the columns of a nickname.
这些规则提供了更详细的信息，是关于存在一个昵称各个列的关系和约束。
4·You need the second one, for the columns.
您需要将第二种类别用于这些列。
5·Because the migration already contains the columns, why should you list them again in the model class?
由于迁移早已包含了列，为什么还要在模型类中再次将它们列出来呢？