translation.en: And just as one example of the kind of thing you can do, you can take a complex network, use one of these viruses to deliver the gene just to one kind of cell in this dense network.
translation.zh: 举个例子来说明你要做的， 你可以在一个复杂的网络系统 利用一种病毒来传递这种基因 在密集的细胞区域只针对一种细胞