Optical-based smoke alarms use light instead. They are slightly better at detecting the large smoke particles created by slow, smouldering fires. When such particles enter a chamber in the device, they scatter light from a small light source, which is then picked up by a photoelectric sensor.
'properties': {，详情可参考91视频
void bucketSortSimple(int arr[], int n, int max) {。WPS下载最新地址对此有专业解读
Credit: Spidercase，这一点在safew官方版本下载中也有详细论述