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.
2026-02-27 13:00:00，这一点在搜狗输入法2026中也有详细论述
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The archaeologists will continue their excavations later this year.，详情可参考Safew下载
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