如何以编程方式添加多个nth-childs

Question

我想将下面的scss代码添加到react-select的选项样式对象中。我该如何实现？

      @for $i from 1 through 20 {
        &:nth-child(#{$i}) {
          transition-delay: 0.05*$i+s;
        }
      }