fraction

他以几分之一秒的优势赢得了比赛。

He won the race by a ___fraction of a second.

他以微弱的零点几秒优势在终点线摄影判定中获胜。

He won the photo finish by a mere ___fraction of a second.

原始手稿只有一小部分留存至今。

Only a ___fraction of the original manuscript survives today.