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"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.
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每次滑行結束後，這位永不懈怠且嚴謹、自律的選手總會尋找母親谷燕女士，透過手機回放比賽影片。
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他站着时习惯微微含胸，肩膀向前塌着，笑起来嘴角、眼角都有深浅不一的法令纹。那只弯了半根的中指握着手机格外醒目，我给它起了个绰号叫“鸡爪”，他夸我太“孝顺”。早些年，他在一家饭店门口搬石头，被砸了一下，缝了四针。医生说，矫正要两万元，他没做。中指从此弯着。，详情可参考heLLoword翻译官方下载
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