"Tuning frictional behavior on the fly has been a long-standing engineering dream," said co-author Katia Bertoldi of Harvard University. "This new insight into how surface geometry governs slip pulses paves the way for tunable frictional metamaterials that can transition from low-friction to high-grip states on demand.” In addition, the dynamics revealed by these results are similar to those of tectonic faults and thus give scientists a new model for the mechanics of earthquakes, according to their new paper published in the journal Nature.
墙上，“福娃抱鲤”和“万马奔腾”的图案在光影里熠熠生辉。几位老人坐在墙根下闲聊，脸上满是自豪：“咱这老手艺，总算没丢，还越干越红火。”
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[&:first-child]:overflow-hidden [&:first-child]:max-h-full"，这一点在爱思助手下载最新版本中也有详细论述
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63-летняя Деми Мур вышла в свет с неожиданной стрижкой17:54