飞现象（Phi phenomenon）是一个由Max Wertheimer在1912年的一篇期刊文章《Experimental Studies on the Seeing of Motion》所提出的知觉错觉现象（错视）。
实验研究了超强超短飞秒激光脉冲在经过块状介质后的光谱展宽和色散补偿压缩现象。
The pulse spectrum broadening and dispersion compensation compression phenomenon when focusing the laser pulse into bulk media are experimentally investigated.
特别是飞秒激光技术的出现，使得人们能够对分子反应动力学中的很多现象进行实时跟踪和探测。
Especially, with the emergence of femtosecond laser techniques, many phenomena of the molecular dynamics can be detected and tracked at real time.
同时，大量员工也随着公司迁出了犯罪率日益上升的城市，有写批评家将这种大规模迁出现象称为“白人群飞”。
Some critics blamed the exodus on "white flight", as businesses followed their employees out of increasingly crime-ridden cities.
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