该激光脉冲调制系统已经应用在皮秒时间相关单光子计数光谱仪系统中，取得了比较理想的效果。
The laser pulse modulation system has been used in a picosecond time-correlated single photon counting spectrometer with perfect effect.
本文的研究方向和内容是根据国家自然科学基金项目—皮秒时间相关单光子计数光谱仪研制来确定的。
The research direction and content of this article is based on the NSFC project -the development of picosecond time-correlated single photon counting (TCSPC) spectrometer.
在讨论原子级别时间的时候，物理学家用起皮秒（百万兆分之一秒）甚至飞秒（千万亿分之一秒）来都没任何不便。 这是一方面。
Physicists have no trouble using, on the one hand, picoseconds (trillionths of a second) or even femtoseconds (quadrillionths of a second) to discuss time at the atomic scale.
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