Why did the air freshener begin to smell good and then it didn't smell good?
Air freshener is best not to be used for too long. It's bad for your health. It's like an evolutionary factory
Not smell habits, that is, volatile volatile
This is the temporary error of human olfaction, that is, the same kind of smell, in an environment, people's sense of smell can be adjusted within ten minutes, so there is no fresh feeling
