How to describe the breath of spring?

The taste of spring is described as follows:

1, the soil in spring removes the snow and ice covering the body, and relaxes the body that has been pressed by snow and ice for several months. The soil in spring exudes a unique earthy fragrance. Wake up the sleeping grass and kobanawa animals.

2. Wild flowers in spring, not to mention fragrant flowers everywhere. These wild flowers are the stage for butterfly girls and other insect girls. They dance here. Add vitality to a beautiful and harmonious home.

3. The orchard in spring is called Xiang. All kinds of fruits, all kinds of aromas. Together, just like the quadrangle in Beijing, people live in one yard, how happy it is. Harmony! I really envy them.

Smell introduction:

Smell is an invisible and intangible abstraction perceived by smell.

Olfactory receptors are located in the olfactory epithelium of the superior nasal meatus and the posterior upper part of the nasal septum, with a total area of about 5cm2 on both sides. Because of their high position, airflow is not easy to reach when breathing calmly. Therefore, when you smell some less obvious smells, you should inhale hard to make the airflow rush up to the olfactory epithelium.

The olfactory epithelium contains three kinds of cells, namely, main cells, supporting cells and basal cells. The main cells, also called olfactory cells, are round bottles. There are five short hairs at the top of the cell and long protrusions at the bottom of the cell to form olfactory filaments, which directly enter the olfactory bulb through the ethmoid bone. When the cilia of olfactory cells are stimulated by substances and molecules existing in the air, a nerve impulse will be transmitted to the olfactory bulb and then to the higher olfactory center, thus causing the sense of smell.