整个过程在零点几秒内就完成了。

The entire process was completed in 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.

只有极少一部分古代手稿留存至今。

Only a tiny ___fraction of the ancient manuscript has survived to the present day.