The beaks of finches in the Galapagos really do thicken over time in response to drought-induced changes in their food supply, just as Darwin predicted.

• 加拉帕戈斯群岛上鸣禽的喙确实会像达尔文所预言的那样，随着时间的推移，为应对干旱而引起的食物供给的变化而变粗变厚。