Now, what you can't see is that our genetic program instructs these bacteria to each produce small molecules, and these molecules travel between the thousands of individual bacteria telling them when to turn on and off.
但你们看不到我们的基因程序如何 指导这些细菌各自产生小分子， 这些分子在数千个 细菌个体之间游移， 告诉它们什么时候 开启和关闭相应的功能。