cháng qī / bù / dǎ sǎo / de / fáng jiān / kōng qì liú tōng / hěn / chà / róng yì / zī shēng / xì jūn

长期不打扫的房间空气流通很差，容易滋生细菌。

Rooms that are not cleaned for a long time have poor air circulation and are prone to bacteria.