single programmed repeatable robot

例句：

1. 1. The single most important factor inthis decision is the cost.
   这个决定中最重要的因素是成本。
2. 2. She has a singlesister and a brother.
   她有一个姐姐和一个哥哥。
3. 3. There are only three singles leftin the box.
   盒子里只剩下三张单人票。