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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A planetary parade describes a moment when several planets appear to line up in the sky from the Earth's perspective.，更多细节参见搜狗输入法2026
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