同义词:at a loss(p)nonplussedpuzzled
ADJ(形容词) If you are nonplussed, you feel confused and unsure how to react. 不知所措的 [usu v-link ADJ]
She expected him to ask for a scotch and was rather nonplussed when he asked her to mix him a martini.
她料想他会要一杯苏格兰威士忌,所以当他请她调一杯马丁尼时,她有点不知所措。