?????? ??????????????????????????? ????????There is not any concrete origin for this term. A favorite perception is usually that it arrived from a 2016 roadside interview during which a reporter questioned an elder bystander who witnessed a fatal site visitors accident. The witness instructed the reporter: ‘I don’t know just about anything. I h

???????????????????????????????????????“??????”?·??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????ppt????????????????????????????????? ??????????????????????????????????????????????? ????? ?????????????????????????????????????? ?????????????????????? ????????????????? ???