Are smell and smell absolute?

Smell and smell are actually the same thing. Fragrance means smell, and smell means smell. The smelliest substances in the world contain fragrances, and these extremely smelly substances are used in all perfumes. It is said that people who have lost their sense of smell due to brain injuries will not be able to distinguish between fragrance and odor, and they will also enjoy some smells that are disgusting to the public, thinking that they are very fragrant. So it is not an absolute, but a relationship between the senses. After the senses are abnormal, the fragrance and odor may be reversed.