Coffee terminology introduces Arabica species (coffee arabica)
Arabica species (coffee arabica): with Robusta species, Liberia species and known as the three original species of coffee. Native farming is Ethiopia. It is the best of the three original species. It is mainly grown in highlands.

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Coffee terminology unwashed coffee (Un-washed Coffee)
Unwashed coffee (Un-washed Coffee): or (natural), (naturally dried). Non-washing coffee: after the coffee fruit is naturally dried by the sun, the pulp and peel is removed by the sheller, and the quality of the coffee is unstable.
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Factors affecting the quality of espresso by making espresso
First, the addition of prepreg time can improve the success rate of extraction to a certain extent, so some high-end machines have the function of adding free control of prepreg time. As for the comparison between prepreg and non-prepreg production methods, it is more inclined to the difference of production style, not the difference between good and bad. Second, water quality is like making tea. It is often said that so-and-so spring water can be used to induce the fragrance of tea. The water quality does have some impact.
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