1.A femtosecond laser pulse lasts on the order of a quadrillionth of a second but reaches a peak power equivalent to that of the entire power grid of North America during its short burst.
这种飞秒激光脉冲持续兆分之一秒(千万亿分之一秒)的时间,但是在其短暂的持续时间内,功率峰值可以达到北美电网功率相当的水平。