失去作用用英语怎么说？

失去作用

例句

• By the early 1980s, the power station had outlived its purpose. 这座电站到20世纪80年代初就已经失去作用了。
• They discovered how to inactivate knock out, single genes in laboratory animals. 他们发现如何使实验用动物体内个体特定基因不活跃、失去作用.