draw a blank什么意思？

draw a blank的音标：draw a blank的英式发音音标为：[drɔ: ə blæŋk]draw a blank的美式发音音标为：[drɔ e blæŋk]...

As he walked he prayed: Let Mr. Cao be back, don't let me draw a blank!一边走,一边心里祷告着: 曹先生可千万回来了, 别教我扑个空!Fallen flowers intends to woo flowing water, only to draw a blank.落花有意随流水, 流水无心恋落花.Every professional knows his e...