redundant arrays of inexpensive disks

例句：

1. 1.The redundant information was deleted from the report.
   报告中多余的信息被删除了。
2. 2.The company decided to cut back on its redundant expenses.
   公司决定减少其不必要的开支。
3. 3. The extra staff is a redundant expense for the company.
   额外的员工对公司来说是不必要的开支。