That's because it can be way cheaper to cultivate tobacco plants in a field than to grow genetically modified yeast and other microbes indoors in large fermenters.

这是为在野外种植烟草，比在室内大型发酵桶中培养酵母和其他微物要便宜得多。

What they eventually find, is that the guy has an over-abundance of brewer's yeast in his digestive system, and it's basically turning his guts into a fermentation vat, converting carbohydrate sugars into ethanol, and getting him sloshed.

他们最终发现，这个人的消化统中有过多的啤酒酵母，这本质上将他的胆变成了一个发酵桶，可以将糖类糖化为乙醇，让他酩酊大醉。

What they eventually find, is that the guy has an over-abundance of brewer’s yeast in his digestive system, and it’s basically turning his guts into a fermentation vat, converting carbohydrate sugars into ethanol, and getting him sloshed.

他们最终发现，这家伙的消化统中有过多的啤酒酵母， 这本上是在把他的内脏变成发酵桶，将碳水化合物化为乙醇， 让他喝醉。