swap(&arr[i], &arr[j]);
// Create a view into the consumer's buffer and fill it。关于这个话题，91视频提供了深入分析
Mark Barnfield, commercial director at Severn Trent Green Power, said the resulting gas was cleaned and either "injected into the gas grid" or converted to electricity.，这一点在WPS下载最新地址中也有详细论述
Timestamps (CTC or TDT):