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.
CREATE UNIQUE INDEX products_name_unique_idx，详情可参考新收录的资料
local listener_npc_id = event_obj.listener_npc_id，更多细节参见新收录的资料
Wordle today: Answer, hints for February 27, 2026