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.

youdao

而有些细菌，特别是寄居在肠道中的细菌，对人体有益。它们帮助我们消化食物，帮助我们保持胃肠道功能平衡。

Some of them, particularly those that live in the gut, are positively beneficial, helping with digestion and keeping the intestines in good working order.

youdao

此外，并非所有的细菌都对人体有害；我们的皮肤上需要有“友好”的细菌来帮助抵抗“坏”的细菌，口腔和肠胃里的细菌可以帮助我们消化食物，防止疾病。

Also, not all germs are harmful; we need friendly bacteria that live on our skin to help fight off bad bugs, and bacteria in our mouth and gut help digest our food and prevent illness and disease.

youdao

to the process whereby the heavenly angels not only eat food but they also digest it; and Milton lets us know, whether we want to know or not, how those angels actually excrete the food they have taken in.

去描述天堂的天使不只吃食物而且要消化它的过程,弥尔顿让我们知道，不管我们想不想，这些天使怎样排泄出他们吃的食物。

耶鲁公开课 - 弥尔顿课程节选