This whisky lays claim to being the first sour mash bourbon.

这款威士忌据说是第一个酸麦芽波本威士忌，它叫什么名字？

What do they use to sour the mash?

他们是用的什么把饲料煮得带有酸味的？

Other preparations for acidification the so-called dry or instant acids consist of pregelatinized flour blended with a sour dough concentrate or of cereal mash prefermented by lactic bacteria.

其他的用于酸化的制剂，也就是所谓的干燥或即溶的酸，是由混合了酸面团浓缩物预糊化面粉或者由乳酸菌预发酵的谷物麦芽汁构成的。