" They'll just have to stand back and let the dragons do their stuff."

“他们只要站在一旁，把事情交给火龙去干就行了。”

Then, once the lines had done their stuff, they analysed the resulting catches.

然后，一旦生产线完成了他们的工作，他们就会分析由此产生的捕获量。

Having done their stuff, the bacteria are returned to their breeding tanks before being used again.

完成任务后，细菌会被放回培养箱，然后再次使用。