4. Coffee 咖啡

While most people drink coffee for that caffeine energy boost, the coffee scent alone is said to help people perform better on analytical reasoning tasks. According to FragranceX, “the smell had a similar effect to (as) if they had ingested the coffee.”

多数人喝咖啡都是为了摄入补充能量的咖啡因，但是据称光是闻一闻咖啡香气就能有助于改善人们在分析推理任务中的表现。香水网站FragranceX指出，“闻咖啡香气和喝咖啡有相似的功效。”

5. Lavender 薰衣草

Lavender is commonly used for relaxation and for falling asleep faster. But did you know that when "lavender essential oil [was inhaled] before doing math problems helped subjects complete the problems faster and more accurately.” The lavender scent is also said to decrease the stress hormone, cortisol, which caused us to be more irritable and less focused.

薰衣草常用于放松和助眠。但是你可知道，“在做数学题之前吸入薰衣草精油香气可以帮助做题者更快做完题目，并提高准确率。”据称，薰衣草香气还能减少压力荷尔蒙皮质醇的分泌，这种荷尔蒙会让我们急躁易怒，注意力难以集中。 

6. Sage 鼠尾草

In a study, Spanish sage essential oil is found to help enhance memory and stimulate brain function, and the scent “significantly improved immediate word recall” in the study’s participants. The robust scent of sage is also said to help reduce stress and anxiety, elevating moods.

一项研究发现，西班牙鼠尾草精油有助于提高记忆力、激发大脑功能。此外鼠尾草香气可以“极大地提高（研究参与者）即刻回忆字词的能力”。据称鼠尾草的浓郁香气还有助于减轻压力和焦虑情绪、改善心情。

7. Vetiver 香根草

Inhaling vetiver scent improves alertness and brain function. A 2016 study also concluded that “the stimulating effects of vetiver essential oil might be beneficial for learning and memory processes” and can be used as a stimulant to improve task performance.

吸入香根草香气可以增强警觉性和大脑功能。2016年的一项研究得出结论称，“香根草精油的提神功效可能有助于学习和记忆”，这种功效也可以用来提升工作表现。