Then, you cool down the milk a little bit, and add some heat-loving, or thermophilic, bacteria.

然后，稍微冷却一下，加入一嗜热菌。

One of the things we know, for instance, is that the “oldest” organisms, the ones that are nearest to the last common ancestor, are all thermophilic organisms.

如我们所知，像这非常相似于远古的那都是这样的嗜温。