We know, odour is formed by volatile element action of material, when the person is inspiratory, wave come loose to be gotten into nasal cavity in aerial odour element, encounter with the olfactory cell inside.

• 我们知道，气味是由物质的挥发性分子作用形成的，当人吸气时，飘散在空中的气味分子钻进鼻腔，与里面的嗅觉细胞相遇。