2. Because iced American is diluted by ice water, different coffee machines and coffee beans can bring different flavors, so the concentration and taste of coffee can't be the same every time, but the tone is bitter.
3. Coffee: a drink made from roasted and ground coffee beans.
4. As one of the three major drinks in the world, it is the main drink popular in the world together with cocoa and tea.
5. Coffee tree is a perennial evergreen shrub or small tree belonging to Rubiaceae. Coffee for daily drinking is made from coffee beans with various cooking utensils, and coffee beans refer to the nuts in the fruit of coffee tree, which are baked by appropriate methods. A cup of standard coffee should not taste bitter. A qualified barista will strictly carry out every step when making coffee. Thirdly, the coffee presented to guests will show different degrees of taste.