В Финляндии предупредили об опасном шаге ЕС против России09:28
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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.
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他把话原封不动转给我：“你看，人家多关心我们一家。”