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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.，这一点在快连下载安装中也有详细论述
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Leaked draft of $1bn memorandum of understanding reveals mandatory targets, sharing of data, and reported access to mining concessions，详情可参考safew官方下载