"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.
这个句式结构，最初源于时尚穿搭博主。某博主在介绍服装时，常说“上身基础，下身就不基础”。后来这种说法被一些网友模仿，“XX基础，XX不基础”就变成了一个百搭句式，比如在评论一个家长不小心把孩子摔了而孩子幸好毫发无损的新闻时，就会开玩笑说：“家长基础，孩子就不基础。”
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往后四十余年的时间证明，这是一个有点奢侈的愿望。即使亲生母亲就在十五公里外的隔壁镇。阿爸的生母在他的童年里几乎空白，直到2015年前后她去世。阿爸对她的印象，也只是卖甜粿的，村里人都叫她“阿英”。，推荐阅读im钱包官方下载获取更多信息