不要依赖空调，排气系统或打开窗户来清洁空气。
Don't rely on an air conditioner, ventilation system or an open window to clear the air.
多拉表示，“如果城市具备清洁交通途径，例如自行车、步行或快速公交系统，那么该市的空气污染就会减少。”
If you have clean transportation means, like cycling, walking or rapid transit systems — where you have a lot of people being carried with a few vehicles — then you have less air pollution.
空气清洁器，气源系统里的一个部件。用于去除供空调系统使用的发动机引气中的灰尘。
Air CLEANER, a component in the pneumatic system for removing dirt from the engine air supply to the air conditioning system.
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