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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.。safew官方下载对此有专业解读
《華爾街日報》報導，蓋茨向員工致歉，並提到他曾有兩名俄羅斯女子有染，後被愛潑斯坦得知。在談到這名已故的金融人士時他表示：「我未曾做過不當之事，也未曾看到不當之事。」
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