Change the filters on your air-conditioning vents. These filters are dust and pollen "magnets".
更换空调通风口的过滤器。这些过滤器是灰尘和花粉的“吸铁石”。
2
Keep car Windows and airvents closed and listen to an EAS radio station.
紧闭车窗和通风口，跟听应急中心的收音机频道。
3
A view that is more common in factories or warehouses of exposed pipes wrapped in silver insulation and metal airvents can be seen suspended from the ceiling in the pictures.