When shoes slide across a floor, wave-like deformations of the sole can generate squeaking. The pitch of the squeak depends on the rate at which deformations are generated.
He pulled on a welder's helmet for protection. He packed it with powder, struck a match and ran like hell.
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光伏巨头晶科能源12年来首次亏损
Цены на нефть взлетели до максимума за полгода17:55
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operated on a stack-backed slice up to the return point.