This is an English muffin and it is a small round, slightly leavened bread.

这是一个英式松饼，它是一个小圆的，稍微发酵的面包。

Sourdough starter is a mixture of flour and water, and it is the life force of sourdough or naturally leavened bread.

酵母发酵剂是面粉和水的混合物，是酵母或自然发酵面包的生命力。

They learned to cultivate olives, vines and date palms. They invented leavened bread, beer, and they developed textile technologies: the potter's wheel, the sail.

他们学会了种植橄榄、葡萄树和枣椰树。他们发明了发酵面包、啤酒，他们还开发了纺织技术：陶轮、帆。

We think ancient Egyptians were eating sourdough too, making it the oldest leavened bread – or, bread that has something in it to make the dough rise.

我们认为古埃及人也吃酸面团， 使它成为最古老的发酵面包——或者，含有可以使面团发酵的面包。