Innumerable examples of evolution in action can be seen all around us, from the pollution-matching pepper moth to fast-changing viruses such as HIV and H5N1 bird flu.

• 在我们的周围可以看到无数活生生的进化的例子，从适应污染的辣椒蛾到快速变异的病毒如HIV和H5N1禽流感病毒。