Creating a suitable microbe involves starting off with one that doespart of the job in question, and then convincing the microbe to specialise in that activity.
You may then want to change that part of your presentation or, at least, you will be prepared if someone does interrupt you.
然后你可能想要改变你演讲中的那一部分，或者，如果确实有人打断了你，你至少会有所准备。
3
As I have been writing and talking about space flight for the best part of 20 years, a sudden switch of interest to the depth of the sea does seem peculiar.