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"