abbr. DF
misc. data field
不过，edit等其他视图已经被生成了，需要添加新的数据域。
But other views such as edit have already been generated, and you need to add your new data fields. For example.
使用 cut 工具，我们可以将构成文件中数据域的各个列分隔开来。
With the cut utility, you can separate columns that could constitute data fields in a file.
给用户返回表单去补充漏填数据的时候，网站应当保留已填数据域的数据。
When a user is returned to a form to fill in missing data, the website should keep completed fields filled in.
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