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High-speed imaging reveals that the squeak of soft–rigid frictional interfaces, like sneakers sliding on a basketball court, arises from intersonic opening slip pulses—analogous to earthquake ruptures—that thin ridges on the rubber confine to repeat at a musical frequency.
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Walmart said it was improving its systems to "ensure fairness and transparency" and had already started making payments to people who had been affected.
在廣東工作的他，回到廣東之後，被要求到派出所登記及報到，讓他感到有點麻煩。然而，導致劉亮想要離開中國的念頭，是在中國結束疫情的「清零」政策、開始解封之後發生。