First, the definition of smell
Identify smells with your nose; Smell.
Second, etymological explanation.
Know words. From the nose, from the smell (smell), smell and sound, that is, smell with the nose. Official script and regular script are heard from the mouth (channel) and smell (smell), that is, through the olfactory channel. The original intention is to identify the smell with the nose.
Extended data:
First, smell [xiù wén]?
Identify smells with your nose.
Second, full of smell [b? oxi]?
Smell as much as possible.
Third, touch the smell [chù xiù]?
Still touching my nose.
Fourth, the olfactory stone [xiù shí]?
The name of the beast.
5. Olfactory nerve?
The first pair of cranial nerves in humans and vertebrates. For sensory nerves. In human body, it is composed of the central branch of olfactory cells located in the olfactory region of nasal mucosa. When the anterior cranial fossa is fractured, the olfactory filament can be torn off, causing olfactory disorder.