duplicate|duplicated|duplicates

我们不需要重复他们已经完成的工作。

We don't need to ___duplicate the work they've already done.

这个学生的论文完全复制了网上的内容，毫无新意。

The student's paper simply ___duplicated content from the internet without any originality.

请确保备份时删除所有重复文件。

Make sure to delete all ___duplicates when backing up your files.