lostadj.迷路的；丢失的；错过的；失败的；不知所措的；摧毁的；被杀死的；忘我的；不能理解的动词lose的过去式和过去分词形式lost sale滞销, 失去销路manufacturers'sales 加工工业产品销售额

1. Let her give you directions when you're lost.
   不知所措时向她请教。
2. They looked perplexed when I told them that their parents had gone.
   当我告诉他们说，他们的父母已经走了，他们显得茫然不知所措。