yeasts

n.

a commercial leavening agent containing yeast cells; used to raise the dough in making bread and for fermenting beer or whiskey

同义词：barm

any of various single-celled fungi that reproduce asexually by budding or division

1. Yeasts are essential in the fermentation process of making bread.
   酵母在面包发酵过程中是必不可少的。
2. There are many different yeasts used in the brewing industry to create unique flavors in beer.
   在酿酒行业中使用了许多不同的酵母，以创造啤酒中独特的风味。