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.
華盛頓特區阿聯酋大使館網站表示，該國「正與特朗普政府合作，在未來十年內對美國進行歷史性的1.4兆美元投資」。
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His mother, Blanche, worked all hours, struggling to keep food on the table. University was well beyond their financial reach.
В Финляндии предупредили об опасном шаге ЕС против России09:28