其中一半田鼠被封闭起来并做周期性的光照实验，每个周期先用150 勒克斯的光照持续照射16个小时，然后完全黑暗持续16个小时。
Half were housed in a standard light-dark cycle of 16 hours of light (at 150 lux) followed by eight hours of total darkness.
当一束聚焦的、调制的激励激光照射固体材料时，表面上除了产生周期性的温度分布，还产生局部的周期性形变。
When a focused, modulated exciting laser beam incidents onto a solid surface, besides generation of periodical temperature distribution, a periodical local surface deformation also occurs.
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