单词quadrillionth
网络: 千万亿分之一；千万亿分之一的；攸
The camera is equipped with a laser that emits extremely short bursts of light every femtosecond -- one-quadrillionth of a second.
摄像机装备了一个每飞秒发射超短激光脉冲（光猝发）的激光发射器。