redundant check

例句：

1. 1. The extra staff will be redundant in the event of a sudden increase in demand.
   在需求突然增加的情况下，额外的员工将是多余的。
2. 2.The design is redundant as it serves no practical purpose.
   这个设计是多余的，因为它没有实际用途。
3. 3. The company's decision to invest in this area was considered redundant by many experts.
   许多专家认为公司在这个领域的投资是多余的。