spheric yeast

例句：

1. 1. The spheric yeast was used to make bread in ancient times.
   古代使用球形酵母制作面包。
2. 2. Spheric yeast is a crucial ingredient in baking.
   球形酵母是烘焙中不可或缺的成分。
3. 3. The spheric yeast has been found to improve the texture of dough.
   球形酵母被发现能改善面团的质地。