Rosenbaum:  So we took all the droplets that had growth in it, and then we added an indicator bacterium that has a light label, a fluorescent label.

罗森鲍姆：所以我们取出了所有在其中生长的液滴，然后我们添加了一种指示细菌， 它有一个光标签， 一个荧光标签。

If these indicator bacteria are able to grow when they are added to the droplet, then we get a light signal—a green or red signal of this droplet.

如果这些指示细菌在被添加到液滴中时能够生长，那么我们就会得到一个光信号——这个液滴的绿色或红色信号。

But a dark droplet—so one without any light coming from it—means if the wild bacteria is killing the indicator bacteria stopping it from growing and stopping it from producing the light.

但是黑色的液滴——也就是没有任何光的液滴——意味着如果野生细菌正在杀死指示细菌，就会阻止它生长并阻止它产生光。