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。