"Yeast" generally refers to "fermentation". Organic matter is decomposed by some bacteria or enzymes, and fungi that can ferment organic matter are called "yeast", also known as "yeast" and "yeast".
Fermentation, using the role of microorganisms, makes organic matter foam and turn sour. Such as steamed bread, wine, vinegar, etc. Also known as yeast.
Jiào fermentation, also known as glycolysis. Organic matter is decomposed by enzymes or some microorganisms (such as fungi) to produce lactic acid, alcohol, carbon dioxide and so on. It also refers to the process of manufacturing industrial raw materials or industrial products with microorganisms. Fungi that can ferment organic matter are called "yeast", and dough containing yeast is called "yeast" in some areas.
Combination of yeasts:
Dry yeast, starter, wine yeast, dry yeast, yeast, true yeast, starter, starter, fermented porridge and starter.