【英语时差8,16】人类嗅觉的奥秘（下）

（单词翻译）

 Since most of the smell receptors are located very high up, near the brain, they are out of the main flow of air. As a result, the smell receptors don’t get a strong dose of whatever’s in the air you’re breathing. But when you sniff¹ — that is, when you take a short, sharp inhalation, you create turbulence² inside your nasal cavity that disrupts the main flow of air and sends more of the air into the out-of-the-way parts of the nasal cavity, including the part where the smell receptors are located. With more air passing by the smell receptors, your sense of smell becomes more perceptive³ of faint odors. You don’t sniff at strong, pungent⁴ smells because a little whiff is enough, and too much could even be harmful. But sniffing⁵ is the body’s way of getting a stronger dose of a weaker scent⁶.