The question that we had is how can bacteria, these primitive organisms, tell the difference from times when they're alone, and times when they're in a community, and then all do something together.
于是我们想, 这些原始生物, 到底如何得知自己是处于孤立的状态, 还是处在一个群体里， 并且同时一起做同一件事情。