<prompt> Translate the following text to SwahiliNote that this C-R function is based on the original air quality dataset used in the ACS study, covering 50 cities, and used the median PM2.  <response>: Kwa mfano, C-RAT ni kipimo cha kiwango cha hewa cha kawaida cha jiji la Marekani, ambacho kinaonyesha kiwango cha hewa cha kawaida cha jiji la Marekani, na kinaonyesha kiwango cha hewa cha kawaida cha jiji la Marekani. 