abbr. DF
misc. data field
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.
操作人员现在还可以跨不同的数据库类型分布不同的数据域(请参见图14)。
Operators can also now spread different data domains across different database types (see Figure 14).
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