Rat studies have employed genetically modified, glowing viruses that trace the network's path.

对老鼠的研究使用了经过基因改造的发光病毒来追踪网络的路径。

This process basically genetically modifies the virus by allowing it to grow inside of some kind of medium that isn’t human cells.

这个过程基本上是通过允许病毒在某种非人类细胞的介质中生长来对病毒进行基因改造。