by a hair's breadth片語KK [baɪ ə hɛrz brɛdθ] /baɪ ə hɛɹz bɹɛdθ/發音片語1僅以毫髮之差、差一點、險勝She won the final race by a hair's breadth.她在最後一場比賽中僅以毫髮之差取勝。2絲毫、一點多用於否定句He would not shift his position by a hair's breadth.他的立場絲毫不肯改變。