translation.en: Now, smell was the hardest of the senses to crack, and the Nobel Prize awarded to Richard Axel and Linda Buck was only awarded in 2004 for their discovery of how smell works.
translation.zh: 嗅觉是最难以 破解的感觉， 2004 年的诺贝尔奖 颁给了 Richard Axel 和 Linda Buck， 因为他们发现了嗅觉是怎样工作的。