无准备的,即席的,还没有准备好的
unprepared adj 1: without preparation; not prepared for; "unprepared remarks"; "the shock was unprepared"; "our treaty makers approached their immensely difficult problems unprepared"- R.E.Danielson [ant: {prepared}] 2: lacking with intellectual equipment; "unprepared to stand on his own feet" 3: not put in a state of preparedness; "the machinery was unprepared for the extra load"