translation.en: But what we were really thinking about is that most of the time bacteria don't live by themselves, they live in incredible mixtures, with hundreds or thousands of other species of bacteria.
translation.zh: 但我们真正思考的问题是， 在多数情况下，细菌并不是单独生活的，它们居住的地方是鱼龙混杂的， 它们跟其它成百上千种的细菌同居一处。