Wùmái tiānqì wǒmen dōu kāi kōngqìjìnghuàqì.
On smoggy days we all run the air purifier.
Zhè tái kōngqìjìnghuàqì dài HEPA lǜwǎng.
This air purifier comes with a HEPA filter.
Jiā lǐ yǎng chǒngwù zuìhǎo mǎi gè kōngqìjìnghuàqì.
If you keep pets at home, it's best to get an air purifier.
