* @param arr 待排序数组
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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Фото: Mario Anzuoni / Reuters
LogosIf you have a Canva Pro subscription, you’ll have a Logos tab. Here, you can upload variations of your brand logo to use throughout your designs.