"Couldyouspeakslowly?"
"Sorry,Ididn`tprepareforthisquestion"
相信英语口语菜的人大有人在,豁出去了保持微笑:Iamsorry!Ibegyourpardon?Idon'***uldyourepeatitagain?
Sorry,Idon'tknow.(Iamlittleacquaintedwiththeaspectofspecialknowledge)ButIwishIcanhaveachancetolearnmoredeeplytheknowledgeunderyourdirection.