by a hair's breadth片语KK [baɪ ə hɛrz brɛdθ] /baɪ ə hɛɹz bɹɛdθ/发音片语1仅以毫发之差、差一点、险胜She won the final race by a hair's breadth.她在最后一场比赛中仅以毫发之差取胜。2丝毫、一点多用于否定句He would not shift his position by a hair's breadth.他的立场丝毫不肯改变。用这个字练口说→