英文释义

　　An expression of frustration at someone's failure tounderstand something that has been explained(NOTE: mildly sarcastic)

　　例句

　　The impatient boss shouted 'do I have to paint you a picture?' when his new assistant failed tounderstand an office procedure.

　　当新来的助手不明白办公室的手续时，不耐烦的老板大喊: “难道要我做给你看？”