A Set is a "collection that contains no duplicate elements."
Set是不包含重复元素的集合。
Another possible task you can explore is to make sure no duplicate entries get added.
另一个您可能想探究的任务是确保不添加重复的条目。
Retention and reuse also mean that no duplicate work needs to be performed each time a newer version of the application is released.
保留和重用还意味着每当发行应用程序的新版本时，不需要做重复的工作。
No dress rehearsal, no duplicate.
没有彩排，没有重复。
A collection that contains no duplicate elements.
不包含重复元素的集合。
A primary key is a constraint that assures that each table contains no duplicate rows.
主键是确保每个表都不包含重复行的约束。
Create a unique constraint to ensure no duplicate values are entered in specific columns that do not participate in a primary key.
创建唯一约束可确保在不参与主键的特定列中不输入重复值。
Create a unique constraint to ensure no duplicate values are entered in specific columns that do not participate in a primary key.
创建唯一约束可确保在不参与主键的特定列中不输入重复值。
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