if (leftArr[i] <= arr[mid + j]) {
狗主蔣小姐則對「灰色地帶」的操作大惑不解。
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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.