MERV等级可以让你知道当花粉和霉菌在空气中传播时，过滤器将如何将之过滤。
A MERV rating tells you how well the filter can remove pollen and mold from the air as it passes through.
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”。
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”。
Change the filters on your air-conditioning vents. These filters are dust and pollen magnets.
花粉的过滤器，用于汽车空调系统。
Pollen filters, using in automotive air conditioning systems.
花粉的过滤器，用于汽车空调系统。
Pollen filters, using in automotive air conditioning systems.
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