by a hair的用法和樣例：
例句
- Even in closely contested elections, most of the pollsters have called the winners, often by margins close to vote tally. And the pollsters who missed were off by a hair.
即使在勝負極為接近的選舉當中，多數民意測驗人員都測出了勝利者。勝負差距往往與點票結果接近。測驗失誤的人也所差微乎其微。 - He missed the target by a hair.
他差一點射中目標。 - As Joe got ready to kick a field goal, the result of the game hung by a hair.
喬準備好要射門時，比賽正好進行到千鈞一髮的關鍵時刻。 - She won by a hair.
她以微弱的優勢獲勝。
