妈妈需要混合酵母菌在面团里才能使面团发起来。

Mother needs to mix yeast into the dough to make it rises.

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利用发酵也可以使做面包的面团发起来，还能帮助我们消化食物。

Fermentation also makes bread dough rise and helps us digest food.

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等面团发起来以后，在面团上洒些干粉，把面团平均分割成12小块。

When risen, turn dough out onto a lightly floured surface and divide into 12 equal pieces.

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