jīn tiān / de / kōng qì / zhì liàng / bù hǎo / kōng qì / zhōng / hán yǒu / dà liàng / xì kē lì wù

今天的空气质量不好，空气中含有大量细颗粒物。

The air quality today is poor, and the air contains a large amount of fine particulate matter.