人们发现并饮用咖啡已有几百年历史了。15世纪随着咖啡豆烘制和研磨技术的发展,咖啡作为一种饮料普及开来,现已成为世界著名三大饮料之一。 咖啡含有咖啡因,这是一种具有明显兴奋作用的神经兴奋剂,饮后使人失去困倦感,降低疲劳和提高工作效率。但同时也能引起欣快感而成瘾。 People find and drink coffee for centuries. In the 15th century, with the development of coffee roasting and grinding technology, coffee has become popular as a beverage and now it has become one of the world’s top three drinks. Caffeine contains caffeine, which is a kind of nerve stimulant with obvious excitement, which can make people lose sleepiness, reduce fatigue and improve working efficiency. But at the same time can also cause euphoria and addiction.