one trillionth (10^-12) of a second; one thousandth of a nanosecond
例句
用作名词(n.)
Transient absorption is based on the idea that molecules absorb light at specific waelengths, and it allows researchers to study eents that happen in less than a picosecond.短暂吸收基于分子吸收特异波长的原理，这使得研究者研究发生反应非常快低于皮秒的事件。
