公众科技网认证
1、请求重复:(sorry,could you repeat that,please 对不起,请你bai再说一遍好吗du?zhi)2、词义模糊如:(i'm sorry ,i'm not sure i understand you.do you mean.... 对不起,我不确定我理解你。你是说?)3、话题不熟(that's a pretty tricky question,would you mind explaining that 这是个很棘手的问题,你能解释一下吗?)